Estimating the Rates of Undiagnosed Prediabetes and Diabetes Among People Experiencing Homelessness

OBJECTIVES

The rising prevalence of type 2 diabetes (T2D) in Canada poses a significant health challenge. Despite the convenience of screening for diabetes with glycated hemoglobin concentration, people experiencing homelessness (PEH) often face barriers to accessing diabetes screening, potentially leading to underdiagnosis. In this study, we aim to assess the prevalence of undiagnosed diabetes among PEH in Calgary, Alberta, and contribute insights for planning healthcare services and public health initiatives.

METHODS

Four screening clinics were held, and participants were recruited through posters and word of mouth. Participants underwent point-of-care glycated hemoglobin (A1C) testing using the Siemens DCA Vantage point-of-care analyzer. Descriptive statistics were used to identify the proportions of prediabetes and diabetes, whereas CanRisk survey scores were used to identify the pre-test probability of diabetes.

RESULTS

The mean age of participants (n=102) was 47.6 years, and the self-reported causes of homelessness among the participants were diverse, including: housing and financial issues (n=53), interpersonal and family issues (n=35), and health or corrections-related factors (n=27). The average A1C was 5.60% (standard deviation 0.57%), with 5 values in the diabetes range and 12 in the prediabetes range, for a total of 17 participants found to have previously undiagnosed dysglycemia.

CONCLUSIONS

The high rate of undiagnosed prediabetes and diabetes among people experiencing homelessness reflects at least what is already seen in the general population in Canada. More resources are required to reduce the barriers to screening for diabetes among this population.

Patterns of metformin use and glycated haemoglobin trends among patients with newly diagnosed type 2 diabetes in Alberta, Canada

AIM

Canadian guidelines recommend metformin as first-line therapy for incident uncomplicated type 2 diabetes and the vast majority of patients are treated accordingly. However, only 54% 65% remain on treatment after 1 year, with the highest discontinuation rates within the first 3 months. The purpose of this study was: (a) to identify individual and clinical factors associated with metformin discontinuation among patients with newly diagnosed uncomplicated type 2 diabetes in Alberta, Canada, and (b) describe glycated haemoglobin (HbA1c) trajectories in the first 12 months after initiation of pharmacotherapy, stratified by metformin usage pattern.

MATERIALS AND METHODS

We conducted a retrospective cohort study using linked administrative datasets from 2012 to 2017 to define a cohort of individuals with uncomplicated incident type 2 diabetes. Using logistic regression, we determined individual and clinical characteristics associated with metformin discontinuation. We categorized individuals based on patterns of metformin use and then used mean HbA1c measurements over a 12-month follow-up period to determine glycaemic trajectories for each pattern.

RESULTS

Characteristics associated with metformin discontinuation were younger age, lower baseline HbA1c and having fewer comorbidities. Sex, income and location (urban/rural) were not significantly associated with metformin discontinuation. Individuals who continued metformin with higher adherence and individuals who discontinued metformin entirely had lowest HbA1c values at 12 months from treatment initiation. Those who changed therapy or had additional therapies added had higher HbA1c values at 12 months.

CONCLUSION

Identifying characteristics associated with discontinuation of metformin and individuals' medication usage patterns provide an opportunity for targeted interventions to support patients' glycaemic management.

The effect of preprandial versus postprandial physical activity on glycaemia: Meta-analysis of human intervention studies

This meta-analysis aims to investigate the effect of preprandial physical activity (PA) versus postprandial PA on glycaemia in human intervention studies. Medline and Embase.com were searched until February 2023 for intervention studies in adults, directly comparing preprandial PA versus postprandial PA on glycaemia. Studies were screened using ASReview (34,837) and full texts were read by two independent reviewers (42 full text, 28 included). Results were analysed using pooled mean differences in random-effects models. Studies were either acute response studies (n = 21) or Randomized Controlled Trials (RCTs) over multiple weeks (n = 7). In acute response studies, postprandial outcomes followed the expected physiological patterns, and outcomes measured over 24 h showed no significant differences. For the RCTs, glucose area under the curve during a glucose tolerance test was slightly, but not significantly lower in preprandial PA vs postprandial PA (-0.29 [95 %CI:-0.66, 0.08] mmol/L, I2 = 64.36 %). Subgroup analyses (quality, health status, etc.) did not significantly change the outcomes. In conclusion, we found no differences between preprandial PA versus postprandial PA on glycaemia both after one PA bout as well as after multiple weeks of PA. The studies were of low to moderate quality of evidence as assessed by GRADE, showed contradictive results, included no long-term studies and used various designs and populations. We therefore need better RCTs, with more similar designs, in larger populations and longer follow-up periods (≥12 weeks) to have a final answer on the questions eat first, then exercise, or the reverse?

[Mobile cardiovascular screening and prevention in the population : useful in Switzerland?]

Mobile cardiovascular prevention interventions are still uncommon in Switzerland. Mobile clinics improve access to prevention and enable new diagnoses of hypertension or hypercholesterolemia to be identified in a cost-effective way and has shown benefits in health behaviors such as physical activity, smoking cessation and medication compliance. The Unisanté Bus Santé is a mobile clinic run by nurses that offers screening for cardiovascular risk factors, health advice and, if necessary, referral to medical care. Mobile health initiatives such as the Bus Santé could play a more important role in the Swiss healthcare system, bringing personalized preventive care closer to the population.

Physician Approaches to Antithrombotic Therapies for Recently Symptomatic Carotid Stenosis

BACKGROUND

Whereas the beneficial effect of antiplatelet therapy for recurrent stroke prevention has been well established, uncertainties remain regarding the optimal antithrombotic regimen for recently symptomatic carotid stenosis. We sought to explore the approaches of stroke physicians to antithrombotic management of patients with symptomatic carotid stenosis.

METHODS

We employed a qualitative descriptive methodology to explore the decision-making approaches and opinions of physicians regarding antithrombotic regimens for symptomatic carotid stenosis. We conducted semi-structured interviews with a purposive sample of 22 stroke physicians (11 neurologists, 3 geriatricians, 5 interventional-neuroradiologists, and 3 neurosurgeons) from 16 centers on four continents to discuss symptomatic carotid stenosis management. We then conducted thematic analysis on the transcripts.

RESULTS

Important themes revealed from our analysis included limitations of existing clinical trial evidence, competing surgeon versus neurologist/internist preferences, and the choice of antiplatelet therapy while awaiting revascularization. There was a greater concern for adverse events while using multiple antiplatelet agents (e.g., dual-antiplatelet therapy (DAPT)) in patients undergoing carotid endarterectomy compared to carotid artery stenting. Regional variations included more frequent use of single antiplatelet agents among European participants. Areas of uncertainty included antithrombotic management if already on an antiplatelet agent, implications of nonstenotic features of carotid disease, the role of newer antiplatelet agents or anticoagulants, platelet aggregation testing, and timing of DAPT.

CONCLUSION

Our qualitative findings can help physicians critically examine the rationale underlying their own antithrombotic approaches to symptomatic carotid stenosis. Future clinical trials may wish to accommodate identified variations in practice patterns and areas of uncertainty to better inform clinical practice.

Association between sodium-glucose cotransporter-2 inhibitors and arrhythmic outcomes in patients with diabetes and pre-existing atrial fibrillation

AIMS

Prior studies suggest that sodium-glucose cotransporter-2 inhibitors (SGLT2is) may decrease the incidence of atrial fibrillation (AF). However, it is unknown whether SGLT2i can attenuate the disease course of AF among patients with pre-existing AF and Type II diabetes mellitus (DM). In this study, our objective was to examine the association between SGLT2i prescription and arrhythmic outcomes among patients with DM and pre-existing AF.

METHODS AND RESULTS

We conducted a population-based cohort study of adults with DM and AF between 2014 and 2019. Using a prevalent new-user design, individuals prescribed SGLT2i were matched 1:1 to those prescribed dipeptidyl peptidase-4 inhibitors (DPP4is) based on time-conditional propensity scores. The primary endpoint was a composite of AF-related healthcare utilization (i.e. hospitalization, emergency department visits, electrical cardioversion, or catheter ablation). Secondary outcome measures included all-cause mortality, heart failure (HF) hospitalization, and ischaemic stroke or transient ischaemic attack (TIA). Cox proportional hazard models were used to examine the association of SGLT2i with the study endpoint. Among 2242 patients with DM and AF followed for an average of 3.0 years, the primary endpoint occurred in 8.7% (n = 97) of patients in the SGLT2i group vs. 10.0% (n = 112) of patients in the DPP4i group [adjusted hazard ratio 0.73 (95% confidence interval 0.55-0.96; P = 0.03)]. Sodium-glucose cotransporter-2 inhibitors were associated with significant reductions in all-cause mortality and HF hospitalization, but there was no difference in the risk of ischaemic stroke/TIA.

CONCLUSION

Among patients with DM and pre-existing AF, SGLT2is are associated with decreased AF-related health resource utilization and improved arrhythmic outcomes compared with DPP4is.

Managing Medications During "Sick Days" in Patients With Diabetes, Kidney, and Cardiovascular Conditions: A Theory-informed Approach to Intervention Design and Implementation

OBJECTIVES

Our aim in this work was to: 1) explore barriers and enablers to patient and health-care provider (HCP) behaviours related to sick-day medication guidance (SDMG), 2) identify theory-informed strategies to advise SDMG intervention design, and 3) obtain perspectives on an eHealth tool for this purpose.

METHODS

A qualitative descriptive study using qualitative conventional content analysis was undertaken. Interviews and focus groups were held with patients and HCPs from January 2021 to April 2022. Data were analyzed using the Behaviour Change Wheel and Theoretical Domains Framework to inform intervention design.

RESULTS

Forty-eight people (20 patients, 13 pharmacists, 12 family physicians, and 3 nurse practitioners) participated in this study. Three interventions were designed to address the identified barriers and enablers: 1) prescriptions provided by a community-based care provider, 2) pharmacists adding a label to at-risk medications, and 3) built-in prompts for prescribing and dispensing software. Most participants accepted the concept of an eHealth tool and identified pharmacists as the ideal point-of-care provider. Challenges for an eHealth tool were raised, including credibility, privacy of data, medical liability, clinician remuneration and workload impact, and equitable access to use of the tool.

CONCLUSIONS

Patients and HCPs endorsed non-technology and eHealth innovations as strategies to aid in the delivery of SDMG. These findings can guide the design of future theory-informed SDMG interventions.

Evaluating the coding accuracy of type 2 diabetes mellitus among patients with non-alcoholic fatty liver disease

BACKGROUND

Non-alcoholic fatty liver disease (NAFLD) describes a spectrum of chronic fattening of liver that can lead to fibrosis and cirrhosis. Diabetes has been identified as a major comorbidity that contributes to NAFLD progression. Health systems around the world make use of administrative data to conduct population-based prevalence studies. To that end, we sought to assess the accuracy of diabetes International Classification of Diseases (ICD) coding in administrative databases among a cohort of confirmed NAFLD patients in Calgary, Alberta, Canada.

METHODS

The Calgary NAFLD Pathway Database was linked to the following databases: Physician Claims, Discharge Abstract Database, National Ambulatory Care Reporting System, Pharmaceutical Information Network database, Laboratory, and Electronic Medical Records. Hemoglobin A1c and diabetes medication details were used to classify diabetes groups into absent, prediabetes, meeting glycemic targets, and not meeting glycemic targets. The performance of ICD codes among these groups was compared to this standard. Within each group, the total numbers of true positives, false positives, false negatives, and true negatives were calculated. Descriptive statistics and bivariate analysis were conducted on identified covariates, including demographics and types of interacted physicians.

RESULTS

A total of 12,012 NAFLD patients were registered through the Calgary NAFLD Pathway Database and 100% were successfully linked to the administrative databases. Overall, diabetes coding showed a sensitivity of 0.81 and a positive predictive value of 0.87. False negative rates in the absent and not meeting glycemic control groups were 4.5% and 6.4%, respectively, whereas the meeting glycemic control group had a 42.2% coding error. Visits to primary and outpatient services were associated with most encounters.

CONCLUSION

Diabetes ICD coding in administrative databases can accurately detect true diabetic cases. However, patients with diabetes who meets glycemic control targets are less likely to be coded in administrative databases. A detailed understanding of the clinical context will require additional data linkage from primary care settings.

Sodium-glucose co-transporter-2 inhibitors are associated with kidney benefits at all degrees of albuminuria: A retrospective cohort study of adults with diabetes

AIM

To estimate the real-world effectiveness of sodium-glucose co-transporter-2 inhibitors (SGLT2is) versus dipeptidyl peptidase-4 inhibitors (DPP4is) at reducing loss of kidney function and adverse kidney events in adults with varying levels of albuminuria.

MATERIALS AND METHODS

In this retrospective cohort study using administrative data, we matched new SGLT2i users 1:2 to DPP4i users on diabetes therapy, chronic kidney disease (CKD) stage, albuminuria and time-conditional propensity score. Albuminuria was defined by spot urine albumin or equivalent as mild, moderate or severe. Linear regression was used to model the estimated glomerular filtration rate (eGFR), and Poisson regression for a composite kidney outcome (> 40% loss of eGFR, kidney replacement therapy or death from kidney causes) and all-cause mortality.

RESULTS

SGLT2i users (n = 19 238, median age 57.9 years, female 40.9%) had mostly nil/mild albuminuria (70.7%). SGLT2is were associated with a 1.36 (95% CI 0.98-1.74) mL/min/1.73m2 (P < .001) acute (≤ 60 days) decline in eGFR, relative to DPP4is. Thereafter, SGLT2is were associated with 1.04 (95% CI 0.93-1.15) mL/min/1.73m2 (P < .001) less annual eGFR loss. SGLT2i users had fewer adverse kidney outcomes (incidence rate ratio [IRR] 0.58 [0.47-0.71]; P < .001), but not all-cause mortality (IRR 0.82 [0.66-1.01]; P = .06). Outcomes were similar considering only those with nil/mild albuminuria.

CONCLUSIONS

SGLT2is may prevent eGFR decline and reduce the risk of adverse kidney events in adults with diabetes and nil or non-severe albuminuria.

Exploring the reliability of inpatient EMR algorithms for diabetes identification

INTRODUCTION

Accurate identification of medical conditions within a real-time inpatient setting is crucial for health systems. Current inpatient comorbidity algorithms rely on integrating various sources of administrative data, but at times, there is a considerable lag in obtaining and linking these data. Our study objective was to develop electronic medical records (EMR) data-based inpatient diabetes phenotyping algorithms.

MATERIALS AND METHODS

A chart review on 3040 individuals was completed, and 583 had diabetes. We linked EMR data on these individuals to the International Classification of Disease (ICD) administrative databases. The following EMR-data-based diabetes algorithms were developed: (1) laboratory data, (2) medication data, (3) laboratory and medications data, (4) diabetes concept keywords and (5) diabetes free-text algorithm. Combined algorithms used or statements between the above algorithms. Algorithm performances were measured using chart review as a gold standard. We determined the best-performing algorithm as the one that showed the high performance of sensitivity (SN), and positive predictive value (PPV).

RESULTS

The algorithms tested generally performed well: ICD-coded data, SN 0.84, specificity (SP) 0.98, PPV 0.93 and negative predictive value (NPV) 0.96; medication and laboratory algorithm, SN 0.90, SP 0.95, PPV 0.80 and NPV 0.97; all document types algorithm, SN 0.95, SP 0.98, PPV 0.94 and NPV 0.99.

DISCUSSION

Free-text data-based diabetes algorithm can yield comparable or superior performance to a commonly used ICD-coded algorithm and could supplement existing methods. These types of inpatient EMR-based algorithms for case identification may become a key method for timely resource planning and care delivery.

Group Versus Individual Diabetes Education for Persons With Experience of Homelessness in Canada

PURPOSE

The purpose of the study was to explore various forms of diabetes self-management education (DSME), including group and individual sessions, for persons with lived experiences of homelessness (PWLEH) in Canada.

METHODS

A qualitative descriptive study using open-ended interviews with health care and homeless sector service providers was utilized to serve those experiencing homelessness in 5 cities across Canada. NVivo qualitative data analysis software was used to facilitate thematic analysis, focusing on variations in DSME for PWLEH.

RESULTS

We conducted interviews with 96 unique health and social care providers. Four themes were identified through focused coding of interviews. First, the use of a harm reduction approach during diabetes education tailored to PWLEH considered patients' access to food, medications, and supplies and other comorbidities, including mental health and substance use disorders. The second theme related to the unsuitability of the curriculum in mainstream diabetes education in a group setting for PWLEH. Third, the role of group education in community building is to create supportive relationships among members. The final theme was the importance of trust and confidentiality in DSME, which were most easily maintained during individual education, compared to group formats.

CONCLUSIONS

Overall, PWLEH experience unique challenges in managing diabetes. DSME adapted to these individuals' unique needs may be more successful and could be delivered in both individual and group settings.

The Association of Homelessness With Rates of Diabetes Complications: A Population-Based Cohort Study

OBJECTIVE

To estimate the rates of diabetes complications and revascularization procedures among people with diabetes who have experienced homelessness compared with a matched cohort of nonhomeless control subjects.

RESEARCH DESIGN AND METHODS

A propensity-matched cohort study was conducted using administrative health data from Ontario, Canada. Inclusion criteria included a diagnosis of diabetes and at least one hospital encounter between April 2006 and March 2019. Homeless status was identified using a validated administrative data algorithm. Eligible people with a history of homelessness were matched to nonhomeless control subjects with similar sociodemographic and clinical characteristics. Rate ratios (RRs) for macrovascular complications, revascularization procedures, acute glycemic emergencies, skin/soft tissue infections, and amputation were calculated using generalized linear models with negative binomial distribution and robust SEs.

RESULTS

Of 1,076,437 people who were eligible for inclusion in the study, 6,944 were identified as homeless. A suitable nonhomeless match was found for 5,219 individuals. The rate of macrovascular complications was higher for people with a history of homelessness compared with nonhomeless control subjects (RR 1.85, 95% CI 1.64-2.07), as were rates of hospitalization for glycemia (RR 5.64, 95% CI 4.07-7.81) and skin/soft tissue infections (RR 3.78, 95% CI 3.31-4.32). By contrast, the rates of coronary revascularization procedures were lower for people with a history of homelessness (RR 0.76, 95% CI 0.62-0.94).

CONCLUSIONS

These findings contribute to our understanding of the impact of homelessness on long-term diabetes outcomes. The higher rates of complications among people with a history of homelessness present an opportunity for tailored interventions to mitigate these disparities.

20-year trends in multimorbidity by race/ethnicity among hospitalized patient populations in the United States

BACKGROUND

The challenges presented by multimorbidity continue to rise in the United States. Little is known about how the relative contribution of individual chronic conditions to multimorbidity has changed over time, and how this varies by race/ethnicity. The objective of this study was to describe trends in multimorbidity by race/ethnicity, as well as to determine the differential contribution of individual chronic conditions to multimorbidity in hospitalized populations over a 20-year period within the United States.

METHODS

This is a serial cross-sectional study using the Nationwide Inpatient Sample (NIS) from 1993 to 2012. We identified all hospitalized patients aged ≥ 18 years old with available data on race/ethnicity. Multimorbidity was defined as the presence of 3 or more conditions based on the Elixhauser comorbidity index. The relative change in the proportion of hospitalized patients with multimorbidity, overall and by race/ethnicity (Black, White, Hispanic, Asian/Pacific Islander, Native American) were tabulated and presented graphically. Population attributable fractions were estimated from modified Poisson regression models adjusted for sex, age, and insurance type. These fractions were used to describe the relative contribution of individual chronic conditions to multimorbidity over time and across racial/ethnic groups.

RESULTS

There were 123,613,970 hospitalizations captured within the NIS between 1993 and 2012. The prevalence of multimorbidity increased in all race/ethnic groups over the 20-year period, most notably among White, Black, and Native American populations (+ 29.4%, + 29.7%, and + 32.0%, respectively). In both 1993 and 2012, Black hospitalized patients had a higher prevalence of multimorbidity (25.1% and 54.8%, respectively) compared to all other race/ethnic groups. Native American populations exhibited the largest overall increase in multimorbidity (+ 32.0%). Furthermore, the contribution of metabolic diseases to multimorbidity increased, particularly among Hispanic patients who had the highest population attributable fraction values for diabetes without complications (15.0%), diabetes with complications (5.1%), and obesity (5.8%).

CONCLUSIONS

From 1993 to 2012, the secular increases in the prevalence of multimorbidity as well as changes in the differential contribution of individual chronic conditions has varied substantially by race/ethnicity. These findings further elucidate the racial/ethnic gaps prevalent in multimorbidity within the United States.

PRIOR PRESENTATIONS

Preliminary finding of this study were presented at the Society of General Internal Medicine (SGIM) Annual Conference, Washington, DC, April 21, 2017.

Lessons learned from a virtual Community-Based Participatory Research project: prioritizing needs of people who have diabetes and experiences of homelessness to co-design a participatory action project

In Community-Based Participatory Research (CBPR), people with shared lived experiences (co-researchers) identify priority needs and work collaboratively to co-design an action-oriented research advocacy project. For this to occur, academic researchers must build mutually respectful partnerships with co-researchers by establishing trust. In the context of the COVID-19 pandemic, our objective was to virtually assemble a group of co-researchers (people with diverse but relevant experiences of homelessness and diabetes) and academic researchers who engaged in the CBPR process to identify a project that would address the difficulties of diabetes management while experiencing homelessness. Co-researchers were recruited to the committee from community homeless-serving organizations. Six co-researchers, one peer researcher and three academic researchers from Calgary, Alberta met virtually for bi-weekly committee meetings, from June 2021 to May 2022 to explore barriers to diabetes management and to complete a priority-setting exercise to determine the focus of our collective project. After reflecting on our virtual CBPR experience we present lessons learned related to: i) technical challenges and logistical considerations, ii) meeting virtually and building rapport, iii) driving engagement, and iv) challenges of transitioning from virtual to in-person meeting format. Overall, the process of conducting a CBPR project virtually to engage a group of co-researchers during a pandemic presents its challenges. However, a virtual CBPR project is feasible and can lead to meaningful experiences that benefit all group members, both from the community and academia.

Managing 'sick days' in patients with chronic conditions: An exploration of patient and healthcare provider experiences

INTRODUCTION

People with chronic medical conditions often take medications that improve long-term outcomes but which can be harmful during acute illness. Guidelines recommend that healthcare providers offer instructions to temporarily stop these medications when patients are sick (i.e., sick days). We describe the experiences of patients managing sick days and of healthcare providers providing sick day guidance to their patients.

METHODS

We undertook a qualitative descriptive study. We purposively sampled patients and healthcare providers from across Canada. Adult patients were eligible if they took at least two medications for diabetes, heart disease, high blood pressure and/or kidney disease. Healthcare providers were eligible if they were practising in a community setting with at least 1 year of experience. Data were collected using virtual focus groups and individual phone interviews conducted in English. Team members analyzed transcripts using conventional content analysis.

RESULTS

We interviewed 48 participants (20 patients and 28 healthcare providers). Most patients were between 50 and 64 years of age and identified their health status as 'good'. Most healthcare providers were between 45 and 54 years of age and the majority practised as pharmacists in urban areas. We identified three overarching themes that summarize the experiences of patients and healthcare providers, largely suggesting a broad spectrum in approaches to managing sick days: Individualized Communication, Tailored Sick Day Practices, and Variation in Knowledge of Sick Day Practices and Relevant Resources.

CONCLUSION

It is important to understand the perspectives of both patients and healthcare providers with respect to the management of sick days. This understanding can be used to improve care and outcomes for people living with chronic conditions during sick days.

PATIENT OR PUBLIC CONTRIBUTION

Two patient partners were involved from proposal development to the dissemination of our findings, including manuscript development. Both patient partners took part in team meetings and contributed to team decision-making. Patient partners also participated in data analysis by reviewing codes and theme development. Furthermore, patients living with various chronic conditions and healthcare providers participated in focus groups and individual interviews.

The contribution of modifiable risk factors to socioeconomic inequities in cardiovascular disease morbidity and mortality: A nationally representative population-based cohort study

This study examined the individual and joint effects of modifiable risk factors mediating the associations between socioeconomic position (SEP) and morbidity and mortality from cardiovascular diseases (CVD) in a nationally representative sample of adults in Canada. Participants in the Canadian Community Health Survey (n = 289,800) were followed longitudinally for CVD morbidity and mortality using administrative health and mortality data. SEP was measured as a latent variable consisting of household income and individual educational attainment. Mediators included smoking, physical inactivity, obesity, diabetes and hypertension. The primary outcome was CVD morbidity and mortality, defined as the first fatal/nonfatal CVD event during follow-up (median 6.2 years). Generalized structural equation modeling tested the mediating effects of modifiable risk factors in associations between SEP and CVD in the total population and stratified by sex. Lower SEP was associated with 2.5 times increased odds of CVD morbidity and mortality (OR: 2.52, 95% CI: 2.28, 2.76). Modifiable risk factors mediated 74% of associations between SEP and CVD morbidity and mortality in the total population and were more important mediators of associations in females (83%) than males (62%). Smoking mediated these associations independently and jointly with other mediators. The mediating effects of physical inactivity were through joint mediating effects with obesity, diabetes or hypertension. There were additional joint mediating effects of obesity through diabetes or hypertension in females. Findings point to modifiable risk factors as important targets for interventions along with interventions that target structural determinants of health to reduce socioeconomic inequities in CVD.

Eliminating Medication Copayments for Low-income Older Adults at High Cardiovascular Risk: A Randomized Controlled Trial

Background: One in eight people with heart disease has poor medication adherence that, in part, is related to copayment costs. This study tested whether eliminating copayments for high-value medications among low-income older adults at high cardiovascular risk would improve clinical outcomes. Methods: This randomized 2x2 factorial trial studied 2 distinct interventions in Alberta, Canada: eliminating copayments for high value preventive medications and a self-management education and support program (reported separately). The findings for the first intervention, which waived the usual 30% copayment on 15 medication classes commonly used to reduce cardiovascular events, compared to usual copayment, is reported herein. The primary outcome was the composite of death, myocardial infarction, stroke, coronary revascularization, and cardiovascular-related hospitalizations over a three-year followup. Rates of the primary outcome and its components were compared using negative binomial regression. Secondary outcomes included quality of life(EQ-5D index score), medication adherence, and overall healthcare costs. Results: 4,761 individuals were randomized and followed for a median of 36 months. There was no evidence of statistical interaction(p=0.99) or of a synergistic effect between the two interventions in the factorial trial with respect to the primary outcome, which allowed us to evaluate the effect of each intervention separately. The rate of the primary outcome was not reduced by copayment elimination, (521 vs 533 events, incidence rate ratio(IRR) 0.84, 95%CI 0.66 to 1.07, p=0.162). The IRR for non-fatal MI, non-fatal stroke, and cardiovascular death (0.97; 95% CI 0.67 to 1.39), death (0.94 (95%CI 0.80 to 1.11) and for cardiovascular-related hospitalizations (0.78 (95%CI 0.57 to 1.06) did not differ between groups. No significant between-group changes in quality of life over time were observed(mean difference 0.012, 95%CI -0.006 to 0.030, p=0.19). The proportion of participants who were adherent to statins was 0.72 vs 0.69 for the copayment elimination vs usual copayment groups, respectively(mean difference 0.03, 95% CI 0.006-0.06, p=0.016). Overall adjusted health care costs did not differ ($3,575, 95%CI -605 to 7,168, p=0.098). Conclusions: In low-income adults at high cardiovascular risk, eliminating copayments (average $35 a month) did not improve clinical outcomes or reduce healthcare costs, despite a modest improvement in adherence to medications.

Self-management Support Using Advertising Principles for Older Low Income Adults at High Cardiovascular Risk: a Randomized Controlled Trial

Background: Self-management education and support (SMES) interventions have modest effects on intermediate outcomes for those at risk of cardiovascular disease, but few studies have measured or demonstrated an impact on clinical endpoints. Advertising for commercial products is known to influence behavior, but advertising principles are not typically incorporated into SMES design. Methods: This randomized trial studied the impact of a novel tailored SMES program designed by an advertising firm among a population of low-income older adults at high cardiovascular risk in Alberta, Canada. The intervention included health promotion messaging from a fictitious "peer" and facilitated relay of clinical information to patients' primary care provider and pharmacist. The primary outcome was the composite of death, myocardial infarction, stroke, coronary revascularization, and hospitalizations for cardiovascular-related ambulatory care-sensitive conditions. Rates of the primary outcome and its components were compared using negative binomial regression. Secondary outcomes included quality of life (EQ-5D index score), medication adherence, and overall healthcare costs. Results: We randomized 4,761 individuals, with a mean age of 74.4 years, of whom 46.8% were female. There was no evidence of statistical interaction (p=0.99) or of a synergistic effect between the two interventions in the factorial trial with respect to the primary outcome, which allowed us to evaluate the effect of each intervention separately. Over a median follow-up time of 36 months, the rate of the primary outcome was lower in the group that received SMES compared with the control group (incidence rate ratio (IRR): 0.78, 95% confidence interval (CI): 0.61-1.00, p=0.047). No significant between-group changes in quality of life over time were observed (mean difference 0.0001, 95%CI -0.018 to 0.018, p=0.99). The proportion of participants who were adherent to medications was not different between the two groups (p = 0.199 for statins, and p=0.754 for ACEi/ARBs). Overall adjusted health care costs did not differ between those receiving SMES and the control group ($2,015, 95%CI -1,953 to 5,985, p=0.320). Conclusions: In low-income older adults, a tailored SMES program using advertising principles reduced the rate of clinical outcomes compared with usual care, though the mechanisms of improvement are unclear and further studies are required.

Patterns and Patients' Characteristics Associated With Use of Sodium-Glucose Cotransporter-2 Inhibitors Among Adults With Type 2 Diabetes: A Population-based Cohort Study

OBJECTIVES

Our aim in this study was to describe patterns and patient-level factors associated with use of sodium-glucose cotransporter-2 inhibitors (SGLT2is) among adults with diabetes being treated in Alberta, Canada.

METHODS

Using linked administrative data sets from 2014 to 2019, we defined a retrospective cohort of adults with prevalent or incident type 2 diabetes with indications for SGLT2i use and who did not have advanced kidney disease (glomerular filtration rate <30 mL/min per 1.73 m²) or previous amputation. We describe medication dispensation patterns of SGLT2is over time in the overall cohort and among the subgroup with cardiovascular disease (CVD). Multivariable logistic regression was used to determine patients' characteristics associated with SGLT2i use.

RESULTS

Of the 341,827 patients with diabetes (mean age, 60.7 years; 45.6% female), 107,244 (31.3%) had CVD. The proportion of patients with an SGLT2i prescription increased in a linear fashion to a maximum of 10.8% (95% confidence interval [CI], 10.7% to 10.9%) of the eligible cohort by the end of the observation period (March 2019). The proportion of filled prescriptions was similar for patients with CVD (10.4%; 95% CI, 10.1% to 10.6%) and for those without CVD (10.9%; 95% CI, 10.8% to 11.0%). Patients' characteristics associated with lower odds of filling an SGLT2i prescription included female sex, older age and lower income.

CONCLUSIONS

The use of SGLT2is is increasing among patients with diabetes but remains low even in those with CVD. Policy and practice changes to increase prescribing, especially in older adults, may help to reduce morbidity and mortality related to cardiovascular and renal complications.

Pharmacists’ role in diabetes management for persons with lived experience of homelessness in Canada: A qualitative study

Introduction

Persons with lived experience of homelessness face many challenges in managing diabetes, including purchasing and storing medications, procuring healthy food and accessing healthcare services. Prior studies have found that pharmacy-led interventions for diabetes improved A1C, and lowered blood pressure and cholesterol in general populations. This study evaluated how select pharmacists in Canada have tailored their practices to serve persons with lived experiences of homelessness with diabetes.

Methods

We conducted a qualitative descriptive study using open-ended interviews with inner-city pharmacists in select Canadian municipalities (Calgary, Edmonton, Vancouver, and Ottawa). We used NVivo qualitative data analysis software to facilitate thematic analysis of the data, focusing on how pharmacists contributed to diabetes care for persons with lived experience of homelessness.

Results

These pharmacists developed diabetes programs after discovering an unmet need in the population. Pharmacists have the unique ability to see patients frequently, allowing tailored education and hands-on assistance with diabetes management. These pharmacists provided extra-ordinary care like financial and housing resources and many of them were uniquely embedded within other services for persons with lived experience of homelessness (i.e. housing and social work supports). Pharmacists reported struggling with balancing optimal medical care for individuals with the financial constraints of running a business.

Conclusion

Pharmacists are vital members of the diabetes care team for persons with lived experience of homelessness. Government policies should support and encourage unique models of care provided by pharmacists to improve diabetes management for this population.

Consensus Recommendations for Sick Day Medication Guidance for People With Diabetes, Kidney, or Cardiovascular Disease: A Modified Delphi Process

RATIONALE & OBJECTIVE

Sick day medication guidance (SDMG) involves withholding or adjusting specific medications in the setting of acute illnesses that could contribute to complications such as hypotension, acute kidney injury (AKI), or hypoglycemia. We sought to achieve consensus among clinical experts on recommendations for SDMG that could be studied in future intervention studies.

STUDY DESIGN

A modified Delphi process following guidelines for conducting and reporting Delphi studies.

SETTING & PARTICIPANTS

An international group of clinicians with expertise relevant to SDMG was recruited through purposive and snowball sampling. A scoping review of the literature was presented, followed by 3 sequential rounds of development, refinement, and voting on recommendations. Meetings were held virtually and structured to allow the participants to provide their input and rapidly prioritize and refine ideas.

OUTCOME

Opinions of participants were measured as the percentage who agreed with each recommendation, whereas consensus was defined as >75% agreement.

ANALYTICAL APPROACH

Quantitative data were summarized using counts and percentages. A qualitative content analysis was performed to capture the context of the discussion around recommendations and any additional considerations brought forward by participants.

RESULTS

The final panel included 26 clinician participants from 4 countries and 10 clinical disciplines. Participants reached a consensus on 42 specific recommendations: 5 regarding the signs and symptoms accompanying volume depletion that should trigger SDMG; 6 regarding signs that should prompt urgent contact with a health care provider (including a reduced level of consciousness, severe vomiting, low blood pressure, presence of ketones, tachycardia, and fever); and 14 related to scenarios and strategies for patient self-management (including frequent glucose monitoring, checking ketones, fluid intake, and consumption of food to prevent hypoglycemia). There was consensus that renin-angiotensin system inhibitors, diuretics, nonsteroidal anti-inflammatory drugs, sodium/glucose cotransporter 2 inhibitors, and metformin should be temporarily stopped. Participants recommended that insulin, sulfonylureas, and meglitinides be held only if blood glucose was low and that basal and bolus insulin be increased by 10%-20% if blood glucose was elevated. There was consensus on 6 recommendations related to the resumption of medications within 24-48 hours of the resolution of symptoms and the presence of normal patterns of eating and drinking.

LIMITATIONS

Participants were from high-income countries, predominantly Canada. Findings may not be generalizable to implementation in other settings.

CONCLUSIONS

A multidisciplinary panel of clinicians reached a consensus on recommendations for SDMG in the presence of signs and symptoms of volume depletion, as well as self-management strategies and medication instructions in this setting. These recommendations may inform the design of future trials of SDMG strategies.

The role of mental disorders in precision medicine for diabetes: a narrative review

This narrative review aims to examine the value of addressing mental disorders as part of the care of people with type 1 and type 2 diabetes in terms of four components of precision medicine. First, we review the empirical literature on the role of common mental disorders in the development and outcomes of diabetes (precision prevention and prognostics). We then review interventions that can address mental disorders in individuals with diabetes or at risk of diabetes (precision treatment) and highlight recent studies that have used novel methods to individualise interventions, in person and through applications, based on mental disorders. Additionally, we discuss the use of detailed assessment of mental disorders using, for example, mobile health technologies (precision monitoring). Finally, we discuss future directions in research and practice and challenges to addressing mental disorders as a factor in precision medicine for diabetes. This review shows that several mental disorders are associated with a higher risk of type 2 diabetes and its complications, while there is suggestive evidence indicating that treating some mental disorders could contribute to the prevention of diabetes and improve diabetes outcomes. Using technologically enabled solutions to identify mental disorders could help individuals who stand to benefit from particular treatments. However, there are considerable gaps in knowledge and several challenges to be met before we can stratify treatment recommendations based on mental disorders. Overall, this review demonstrates that addressing mental disorders as a facet of precision medicine could have considerable value for routine diabetes care and has the potential to improve diabetes outcomes.

Identifying subgroups of adult high-cost health care users: a retrospective analysis

BACKGROUND

Few studies have categorized high-cost patients (defined by accumulated health care spending above a predetermined percentile) into distinctive groups for which potentially actionable interventions may improve outcomes and reduce costs. We sought to identify homogeneous groups within the persistently high-cost population to develop a taxonomy of subgroups that may be targetable with specific interventions.

METHODS

We conducted a retrospective analysis in which we identified adults (≥ 18 yr) who lived in Alberta between April 2014 and March 2019. We defined "persistently high-cost users" as those in the top 1% of health care spending across 4 data sources (the Discharge Abstract Database for inpatient encounters; Practitioner Claims for outpatient primary care and specialist encounters; the Ambulatory Care Classification System for emergency department encounters; and the Pharmaceutical Information Network for medication use) in at least 2 consecutive fiscal years. We used latent class analysis and expert clinical opinion in tandem to separate the persistently high-cost population into subgroups that may be targeted by specific interventions based on their distinctive clinical profiles and the drivers of their health system use and costs.

RESULTS

Of the 3 919 388 adults who lived in Alberta for at least 2 consecutive fiscal years during the study period, 21 115 (0.5%) were persistently high-cost users. We identified 9 subgroups in this population: people with cardiovascular disease (n = 4537; 21.5%); people receiving rehabilitation after surgery or recovering from complications of surgery (n = 3380; 16.0%); people with severe mental health conditions (n = 3060; 14.5%); people with advanced chronic kidney disease (n = 2689; 12.7%); people receiving biologic therapies for autoimmune conditions (n = 2538; 12.0%); people with dementia and awaiting community placement (n = 2520; 11.9%); people with chronic obstructive pulmonary disease or other respiratory conditions (n = 984; 4.7%); people receiving treatment for cancer (n = 832; 3.9%); and people with unstable housing situations or substance use disorders (n = 575; 2.7%).

INTERPRETATION

Using latent class analysis supplemented with expert clinical review, we identified 9 policy-relevant subgroups among persistently high-cost health care users. This taxonomy may be used to inform policy, including identifying interventions that are most likely to improve care and reduce cost for each subgroup.

Are stress-related pathways of social status differentiation more important determinants of health inequities in countries with higher levels of income inequality?

We explored socioeconomic gradients in self-rated overall health (SROH) using indicators of materialist (educational attainment and perceived income adequacy) and psychosocial perspectives (subjective social status (SSS)) among adults living in countries with varying levels of income inequality, and the importance of psychosocial stress in mediating these associations. If psychosocial processes at the individual and societal levels correspond, associations between SSS and SROH should be higher among adults in countries with higher income inequality, and psychosocial stress should be a more important mediator of these associations. We used multigroup structural equation models to analyse cross-sectional data from the International Food Policy Study of adults (n = 22,824) in Australia, Canada, Mexico, the UK and the United States. Associations between SSS and SROH were not higher in more unequal countries, nor was psychosocial stress a more important mediator of these associations. Inequities in SROH in more unequal countries may not predominantly reflect stress-related pathways of social status differentiation.

Sex and Gender Related Differences in Diabetic Kidney Disease

Diversity in sex and gender are important considerations in the pathogenesis, prognostication, research, and management of diabetic kidney disease (DKD). Sex and gender differences in the disease risk, disease-specific mechanisms, and outcomes in DKD may be attributed to biological differences between males and females at the cellular and tissue level, inconsistencies in the diagnostic and assessment tools used in chronic kidney disease and DKD, as well societal differences in the way men, women, and gender-diverse individuals self-manage and interact with health care systems. This review outlines key considerations related to the impact of sex on DKD, specifically elaborating on how they contribute to observed differences in disease epidemiology, pathogenesis, and treatment strategies. We also highlight the effect of gender on DKD progression and care.

Healthy food prescription incentive programme for adults with type 2 diabetes who are experiencing food insecurity: protocol for a randomised controlled trial, modelling and implementation studies

INTRODUCTION

The high cost of many healthy foods poses a challenge to maintaining optimal blood glucose levels for adults with type 2 diabetes mellitus who are experiencing food insecurity, leading to diabetes complications and excess acute care usage and costs. Healthy food prescription programmes may reduce food insecurity and support patients to improve their diet quality, prevent diabetes complications and avoid acute care use. We will use a type 2 hybrid-effectiveness design to examine the reach, effectiveness, adoption, implementation and maintenance (RE-AIM) of a healthy food prescription incentive programme for adults experiencing food insecurity and persistent hyperglycaemia. A randomised controlled trial (RCT) will investigate programme effectiveness via impact on glycosylated haemoglobin (primary outcome), food insecurity, diet quality and other clinical and patient-reported outcomes. A modelling study will estimate longer-term programme effectiveness in reducing diabetes-related complications, resource use and costs. An implementation study will examine all RE-AIM domains to understand determinants of effective implementation and reasons behind programme successes and failures.

METHODS AND ANALYSIS

594 adults who are experiencing food insecurity and persistent hyperglycaemia will be randomised to a healthy food prescription incentive (n=297) or a healthy food prescription comparison group (n=297). Both groups will receive a healthy food prescription. The incentive group will additionally receive a weekly incentive (CDN$10.50/household member) to purchase healthy foods in supermarkets for 6 months. Outcomes will be assessed at baseline and follow-up (6 months) in the RCT and analysed using mixed-effects regression. Longer-term outcomes will be modelled using the UK Prospective Diabetes Study outcomes simulation model-2. Implementation processes and outcomes will be continuously measured via quantitative and qualitative data.

ETHICS AND DISSEMINATION

Ethical approval was obtained from the University of Calgary and the University of Alberta. Findings will be disseminated through reports, lay summaries, policy briefs, academic publications and conference presentations.

TRIAL REGISTRATION NUMBER

NCT04725630.

PROTOCOL VERSION

Version 1.1; February 2022.

Apparent failed and discordant adrenal vein sampling: A potential confounding role of cortisol cosecretion?

OBJECTIVE

Adrenal vein sampling (AVS) and computed tomography (CT) often show confusingly discordant lateralisation results in primary aldosteronism (PA). We tested a biochemical algorithm using AVS data to detect cortisol cosecretion as a potential explanation for discordant cases.

DESIGN

Retrospective analysis from a large PA + AVS database.

PATIENTS

All patients with PA and AVS, 2005-2020.

MEASUREMENTS

An algorithm using biochemical data from paired AVS + CT images was devised from physiological first principles and informed by data from unilateral, AVS-CT concordant patients. The algorithm involved calculations based upon the expectation that low cortisol levels exist in adrenal vein effluent opposite an aldosterone-and-cortisol-producing adrenal mass and may reverse lateralisation due to inflated aldosterone/cortisol ratios.

MAIN OUTCOMES

The algorithm was applied to cases with discordant CT-AVS lateralisation to determine whether this might be a common or explanatory finding. Clinical and biochemical characteristics of identified cases were collected via chart review and compared to CT-AVS concordant cases to detect evidence of biological plausibility for cortisol cosecretion.

RESULTS

From a total of 588 AVS cases, 141 AVS + CT pairs were clear unilateral PA cases, used to develop the three-step algorithm for AVS interpretation. Applied to 88 AVS + CT discordant pairs, the algorithm suggested possible cortisol cosecretion in 40%. Case review showed that the proposed cortisol cosecretors, as identified by the algorithm, had low/suppressed adrenocorticotropic hormone levels, larger average nodule size and lower plasma aldosterone.

CONCLUSIONS

Pending external validation and outcome verification by surgery and tissue immunohistochemistry, cortisol cosecretion from aldosteronomas may be a common explanation for discordant CT-AVS results in PA.

Factors Affecting the Reception of Self-Management Health Education: A Cross-Sectional Survey Assessing Perspectives of Lower-Income Seniors with Cardiovascular Conditions

INTRODUCTION

Self-management education and support (SMES) programs can prevent adverse chronic disease outcomes, but factors modifying their reception remain relatively unexplored. We examined how perceptions of an SMES program were influenced by the mode of delivery, and co-receipt of a paired financial benefit.

METHODS AND PATIENTS

Using a cross-sectional survey, we evaluated the perceived helpfulness of a SMES program among 446 low-income seniors at high risk for cardiovascular events in Alberta, Canada. Secondary outcomes included frequency of use, changes in perspectives on health, satisfaction with the program, and comprehensibility of the material. Participants received surveys after engaging with the program for at least 6 months. We used modified Poisson regression to calculate relative risks. Open-ended questions were analyzed inductively.

RESULTS

The majority of participants reported that the SMES program was helpful (>80%). Those who also received the financial benefit (elimination of medication copayments) were more likely to report that the SMES program was helpful (RR 1.24, 95% CI 1.11-1.39). Those who received the program electronically were more likely to use the program weekly (RR 1.51, 1.25-1.84). Both those who received the intervention electronically (RR 1.18, 1.06-1.33), and those who also received copayment elimination (RR 1.17, 1.05-1.31) were more likely to state that the program helped change their perspectives on health.

CONCLUSION

When designing SMES programs, providing the option for electronic delivery appears to promote greater use for seniors. The inclusion of online-delivery and co-receipt of tangible benefits when designing an SMES program for seniors results in favorable reception and could facilitate sustained adherence to health behavior recommendations. Participants also specifically expressed that what they enjoyed most was that the SMES program was informative, helpful, engaging, and supportive.

Predictors of attitudes and adherence to COVID-19 public health guidelines in Western countries: a rapid review of the emerging literature

BACKGROUND

Physical distancing, wearing face masks and hand hygiene are evidence-based methods to protect the public from coronavirus disease 2019 (COVID-19) infection. There has been a proliferation of research examining characteristics that can be targeted by public health interventions. This rapid review sought to identify predictors of attitudes toward and adherence to COVID-19 public health guidelines, and identify interventions aiming to improve adherence.

METHODS

Articles were retrieved from multiple databases (e.g. MEDLINE, CINAHL and medRxiv) on 6 August 2020. Studies were limited to samples collected from Western countries. Studies were classified according to the types of factor (s) examined as independent variables. The consistency of evidence for each factor was scored by two reviewers.

RESULTS

In total, 1323 unique articles were identified in the initial search, resulting in 29 studies in the final synthesis. The available evidence suggests individuals who are older, identify as women, trust governments, perceive COVID-19 as threatening and access information through traditional news media are more likely to adhere with COVID-19 public health guidelines. Interventions for improving adherence have not yet been investigated thoroughly, and this review identified only three experimental studies.

CONCLUSIONS

This review has identified several characteristics that impact attitudes and adherence to COVID-19 public health guidelines.

Stress-Related Poor Diet Quality Does Not Explain Socioeconomic Inequities in Health: A Structural Equation Mediation Analysis of Gender-Specific Pathways

BACKGROUND

Psychosocial stress and diet quality individually mediate associations between socioeconomic position (SEP) and health; however, it is not known whether they jointly mediate these associations. This is an important question because stress-related unhealthy eating is often invoked as an explanation for diet-related health inequities, particularly among women, seemingly with no empirical justification.

OBJECTIVE

This study examined whether psychosocial stress and diet quality jointly mediated associations between SEP and self-rated health in women and men.

DESIGN

Multiple mediating pathways were modeled using data from the cross-sectional International Food Policy Study.

PARTICIPANTS AND SETTING

Data were collected from 5,645 adults (aged 18 years or older) in Canada during 2018 and 2019.

MAIN OUTCOME MEASURES

Participants reported SEP using indicators of materialist (educational attainment and perceived income adequacy) and psychosocial pathways (subjective social status), along with psychosocial stress, dietary intake (to assess overall diet quality via Healthy Eating Index-2015 scores), and self-rated health.

STATISTICAL ANALYSES PERFORMED

Structural equation modeling modeled pathways linking SEP (ie, educational attainment, perceived income adequacy, and subjective social status) with self-rated health mediated by psychosocial stress and diet quality, stratified by gender.

RESULTS

There was no evidence that psychosocial stress and diet quality jointly mediated associations between SEP and self-rated health in women or men. Diet quality mediated associations between educational attainment and self-rated health in women and men, with some evidence that it mediated associations between subjective social status and self-rated health in men (P = 0.051). Psychosocial stress mediated associations between perceived income adequacy and self-rated health in women and men, and between subjective social status and self-rated health in women.

CONCLUSIONS

Although often invoked as an explanation for diet-related health inequities, stress-related poor diet quality did not mediate associations between SEP and self-rated health in women or men. Psychosocial stress and diet quality individually mediated some of these associations, with some differences by gender.

Using a community-based participatory research approach to meaningfully engage those with lived experience of diabetes and homelessness

INTRODUCTION

Participatory research is a study method that engages patients in research programs, ideally from study design through to dissemination. It is not commonly used in diabetes health services research. Our objectives were to describe the process and challenges of conducting a participatory research project and to highlight the experiences of both patient co-researchers and academic researchers.

RESEARCH DESIGN AND METHODS

We recruited people with lived experience of homelessness (PWLEH) and diabetes in Toronto, Canada to become patient co-researchers. They were asked to commit to attending biweekly meetings. We undertook two major research projects: concept mapping to choose a research focus; and photovoice to explore accessing healthy food while homeless. We used a convergent mixed-methods design to evaluate their experience.

RESULTS

A diverse group of eight PWLEH had an average attendance of 82% over 21 meetings-despite this success, we encountered a number of challenges of conducting this research: funding, ethics approval and recruitment were particularly difficult. Group members reported that participation improved their ability to self-advocate in their diabetes care and provided them with tangible skills and social benefits. Group members stated that they valued being involved in all aspects of the research, in particular knowledge translation activities, including advocating for nutritious food at shelters; presenting to stakeholders; and meeting with policymakers.

CONCLUSIONS

The use of participatory research methods enables academic researchers to support community members in pursuing research that is pertinent to them and which has a positive impact. In our study, co-researchers contributed in meaningful ways and also valued the experience.

First-line pharmacotherapy for incident type 2 diabetes: Prescription patterns, adherence and associated costs

AIMS

To use real-world prescription data from Alberta, Canada to: (a) describe the prescribing patterns for initial pharmacotherapy for those with newly diagnosed uncomplicated type 2 diabetes; (b) describe medication-taking behaviours (adherence and persistence) in the first year after initiating pharmacotherapy; and (c) explore healthcare system costs associated with prescribing patterns.

METHODS

We employed a retrospective cohort design using linked administrative datasets from 2012 to 2017 to define a cohort of those with uncomplicated incident diabetes. We summarized the initial prescription patterns, adherence and costs (healthcare and pharmaceutical) over the first year after initiation of pharmacotherapy. Using multivariable regression, we determined the association of these outcomes with various sociodemographic characteristics.

RESULTS

The majority of individuals for whom metformin was indicated as first-line therapy received a prescription for metformin monotherapy (89%). Older individuals, those with higher baseline A1C and those with no comorbidities, were most likely to be started on non-metformin agents. Adherence with the initially prescribed regimen was suboptimal overall, with nearly half (48%) being non-adherent over the first year. One-third of those who started metformin discontinued it in the first 3 months. Those started on non-metformin agents had roughly twice the healthcare costs, and five to seven times higher medication costs, compared to those started on metformin, in the first year after starting therapy.

CONCLUSIONS

With the addition of new classes of medications, healthcare providers who look after those with type 2 diabetes have more pharmaceutical options than ever. Most individuals continue to be prescribed metformin monotherapy. However, adherence is suboptimal, and drops off considerably within the first 3 months.

Les défis de la gestion du diabète chez les personnes itinérantes : étude qualitative avec la méthode photovoix

CONTEXTE:

La recherche sur les défis de la prise en charge du diabète chez les personnes itinérantes qui en sont atteintes n’a pas tendance à prendre en considération le point de vue des personnes touchées. Nous avons utilisé une approche de recherche participative avec la communauté pour explorer ces défis.

MÉTHODES:

Nous avons recruté des cochercheurs ayant une connaissance expérientielle de l’itinérance et du diabète. Les chercheurs principaux leur ont offert une formation en recherche et ont préparé le terrain avec eux pour ce projet. Les cochercheurs ont collectivement choisi d’utiliser la méthode photovoix pour illustrer la difficulté de bien s’alimenter quand on est en situation d’itinérance et explorer en quoi cet écueil affecte plus largement la gestion du diabète. Après une formation en photographie et en éthique, les cochercheurs ont pris des photos en lien avec les objectifs du projet et rédigé des récits connexes au moyen de techniques de rédaction inspirée par des photos. Les chercheurs principaux ont analysé les photos et les récits, et ils en ont dégagé des thèmes qui se sont précisés lors de discussions de groupe.

RÉSULTATS:

Les 8 cochercheurs étaient atteints de diabète de type 2 (diagnostiqué de 18 mois à 23 ans auparavant) et avaient vécu en situation d’itinérance pendant des périodes allant de 8 mois à 12 ans. Nous avons dégagé 4 thèmes à partir de 17 photos et récits produits. L’itinérance affecte grandement la santé émotionnelle et mentale des personnes, ce qui nuit à leur capacité de bien gérer leur diabète. Les aliments servis dans les refuges sont rarement nutritifs ou appétissants. L’obtention d’une forme de logement peut faciliter la prise en charge du diabète en créant un environnement stable qui favorise l’autonomie, mais les coûts et le manque de connaissances sont des obstacles à la préparation de repas sains. L’itinérance complique aussi l’accès aux professionnels de la prise en charge du diabète et aux médicaments d’ordonnance.

INTERPRÉTATION:

Les images et les récits associés permettent de dresser un tableau frappant, complet et fidèle des défis auxquels sont confrontées les personnes en situation d’itinérance qui essaient de gérer leur diabète. Comprendre ces défis est la première étape qui permettra aux intervenants et aux décideurs de répondre aux besoins de cette population.

Using concept mapping to prioritize barriers to diabetes care and self-management for those who experience homelessness

BACKGROUND

Diabetes is a chronic medical condition which demands that patients engage in self-management to achieve optimal glycemic control and avoid severe complications. Individuals who have diabetes and are experiencing homelessness are more likely to have chronic hyperglycemia and adverse outcomes. Our objective was to collaborate with individuals experiencing homelessness and care providers to understand the barriers they face in managing diabetes, as a first step in identifying solutions for enhancing diabetes management in this population.

METHODS

We recruited individuals with lived experience of homelessness and diabetes (i.e. clients; n = 32) from Toronto and health and social care providers working in the areas of diabetes and/or homelessness (i.e. providers; n = 96) from across Canada. We used concept mapping, a participatory research method, to engage participants in brainstorming barriers to diabetes management, which were subsequently categorized into clusters, using the Concept Systems Global MAX software, and rated based on their perceived impact on diabetes management. The ratings were standardized for each participant group, and the average cluster ratings for the clients and providers were compared using t-tests.

RESULTS

The brainstorming identified 43 unique barriers to diabetes management. The clients' map featured 9 clusters of barriers: Challenges to getting healthy food, Inadequate income, Navigating services, Not having a place of your own, Relationships with professionals, Diabetes education, Emotional wellbeing, Competing priorities, and Weather-related issues. The providers' map had 7 clusters: Access to healthy food, Dietary choices in the context of homelessness, Limited finances, Lack of stable, private housing, Navigating the health and social sectors, Emotional distress and competing priorities, and Mental health and addictions. The highest-rated clusters were Challenges to getting healthy food (clients) and Mental health and addictions (providers). Challenges to getting healthy food was rated significantly higher by clients (p = 0.01) and Competing priorities was rated significantly higher by providers (p = 0.03).

CONCLUSIONS

Experiencing homelessness poses numerous barriers to managing diabetes, the greatest of which according to clients, is challenges to getting healthy food. This study showed that the way clients and providers perceive these barriers differs considerably, which highlights the importance of including clients' insights when assessing needs and designing effective solutions.

Strategies for enhancing the initiation of cholesterol lowering medication among patients at high cardiovascular disease risk: a qualitative descriptive exploration of patient and general practitioners' perspectives on a facilitated relay intervention in Alberta, Canada

OBJECTIVE

The objective of our study was to explore the perspectives of patients and general practitioners (GPs) regarding interventions to increase initiation of cholesterol lowering medication (or statins), including a proposed laboratory-based facilitated relay intervention.

DESIGN

Qualitative descriptive study using interviews and focus groups for data collection, and thematic analysis for data analysis.

SETTING

Primary care providers and patients in Calgary, Alberta, Canada.

PARTICIPANTS

17 GPs with primarily community-based, non-academic practices with at least 1 year of practice experience participated in semistructured interviews. 14 patients at high risk of cardiovascular disease participated in focus groups.

MAIN OUTCOME MEASURES

Exploration of strategies that might be used to enhance the prescription of, and adherence to statin therapy for patients with statin-indicated conditions.

RESULTS

GPs proposed a variety of interventions to improve statin prescription, including electronic record audit solutions, GP directed education, and patient-oriented campaigns. Patients expressed that they may benefit from being provided access to their laboratory test results, as well as targeted education. Both parties provided positive feedback on the proposed laboratory-based facilitated relay intervention, while pointing out areas for improvement. Notably, GPs were concerned that the patient-directed component of the intervention might jeopardise therapeutic relationships, and patients were concerned about accidental disclosure of personal health information. Important considerations for the design of facilitated relay messaging should include brevity, simplicity and the provision of contact information for inquiries.

CONCLUSIONS

GPs and patients described several suggestions for increasing statin initiation and welcomed the proposal of a laboratory-based facilitated relay strategy. These findings support further testing of this intervention which may enhance GPs' ability to successfully engage patients in cardiovascular risk reduction through statin therapy.

Pharmacist and patient perspectives on recruitment strategies for randomized controlled trials: a qualitative analysis

BACKGROUND

Although recruitment is a major challenge for most randomized controlled trials, few report on the difficulties of recruitment, or how it might be enhanced. The objective of our study was to qualitatively explore the experiences of both patients and pharmacists related to recruitment for ACCESS, a large trial involving low-income seniors, given that two of our most successful recruitment strategies were direct patient recruitment materials and use of community pharmacists.

METHODS

Using qualitative descriptive methods, we collected data from pharmacists and study participants. Pharmacists were asked about their impressions of the study, as well as challenges they faced and methods they used to recruit potential participants. Focus groups with trial participants centered on the patient recruitment materials. Interviews and focus groups were recorded, transcribed and analyzed using thematic analysis.

RESULTS

Pharmacists noted that their first impressions of the study were positive as they described being enticed to help the study team by the potential benefit of copayment elimination for their patients and the low time commitment. Pharmacists noted they were more likely to recruit if they were well informed on the study, as they could answer their patients' questions. Participants noted that their primary motivations for participating were the tangible benefits of free medications and the intrinsic value of participating in research.

CONCLUSIONS

We noted that recruitment through pharmacies was an effective method as most patients have trusting relationships with their pharmacist. To optimize recruitment through pharmacies, study procedures should be straightforward, and pharmacists need to be equipped with good knowledge of the study. When promoting a study to potential participants, messaging should ensure the individuals are aware of the tangible benefits of participation while still presenting a full overview of the trial.

TRIAL REGISTRATION

Trial Registration Number: NCT02579655 - initially registered Oct 19, 2015.

Exploring patient and pharmacist perspectives on complex interventions for cardiovascular prevention: A qualitative descriptive process evaluation

BACKGROUND

The Assessing outcomes of enhanced Chronic disease Care through patient Education and a value-baSed formulary Study (ACCESS) is a randomized controlled trial evaluating two interventions targeting barriers to care among those at high risk of cardiovascular disease: copayment elimination for cardioprotective medications, and a tailored self-management support programme. We designed a process evaluation to better understand participant perspectives on the interventions.

DESIGN

We used a qualitative descriptive study design, collecting patient and pharmacist feedback via individual semi-structured telephone interviews and in-person focus groups. Data were analysed inductively using thematic analysis.

RESULTS

Fifty-three patients (39 interviews and 14 in two focus groups) and 20 pharmacists participated. Copayment elimination provided quality of life benefits: minimizing the need to 'cut-back', allowing 'peace of mind' and providing emotional support. Health-related benefits included: improving adherence to covered medications, and helping to afford non-covered goods. The only criticism was that not all medications and testing supplies were covered. Patients reported that the educational materials provided helpful information, acted as a reminder, improved confidence, improved adherence to medication, and helped initiate conversations with providers about indicated medication. Some participants felt that the educational materials were repetitive, overly medication-focused and not tailored enough. Pharmacists felt that their patients benefitted from both interventions, which improved patient adherence and communication with their patients.

CONCLUSION

The success of interventions intended to change behaviour is largely dependent upon participant's feelings that the intervention is helpful. This process evaluation provided insights into participants' perceptions on these interventions. Reception of both was largely positive with a few criticisms noted.

Barriers and Facilitators to Using Statins: A Qualitative Study With Patients and Family Physicians

Background

Despite their proven efficacy to reduce cardiovascular disease, statin medication use remains low in individuals at high risk of cardiovascular disease considering their widespread availability and safety. Our objective was to explore the perspectives of patients and family physicians with regard to the barriers and facilitators of statin use in primary care.

Methods

In this qualitative descriptive study, we conducted 2 focus groups with patients (number, n = 8/6) and individual semistructured interviews with family physicians (n = 17) from community settings. Interviewers asked participants about barriers to and facilitators of statin use. Focus groups and interviews were digitally recorded, transcribed, and analyzed in duplicate using conventional content analysis.

Results

Patients were averse to taking statins for a variety of reasons: medication avoidance and burden; inadequate buy-in for statin therapy; and difficulty remembering to take statins regularly. Family physicians perceived similar barriers and reported other barriers: lack of resources such as inadequate tracking systems; specialist-primary care provider guideline discordance; and lack of continuity and relationship. Patients expressed that key facilitators were patient education and support; splitting tablets to increase cost-effectiveness; and changing to a different statin or lower dose in those with side effects. Family physicians described several similar strategies to facilitate therapy as well as shared decision making and clinical decision support tools as enablers for improvement.

Conclusions

We identified several important barriers to and facilitators of statin use at the patient and prescriber level. This information offers insight into strategies to improve statin use and the development of innovative programs and interventions.

Innovations in Providing Diabetes Care for Individuals Experiencing Homelessness: An Environmental Scan

OBJECTIVES

For a variety of reasons, homelessness creates major challenges for the management of diabetes, resulting in excess morbidity and mortality in this population. The objective of this study was to document innovations in providing diabetes care for individuals experiencing homelessness.

METHODS

Using directed snowball sampling, we recruited a sample of service providers (family physicians, nurses, social workers, endocrinologists, diabetes educators, shelter workers) in 5 Canadian cities (Vancouver, Calgary, Edmonton, Toronto, Ottawa). Data were collected using detailed, open-ended interviews. Transcripts and field notes were analyzed using thematic analysis.

RESULTS

We interviewed 96 program managers and providers representing 38 organizations. Although many of the same challenges were faced by care providers in different jurisdictions, there was little communication or sharing of experiences across providers and organizations. However, we identified 5 unique and innovative approaches to providing diabetes care to individuals experiencing homelessness. These include: 1) provision of in-shelter care, 2) peer outreach/support workers, 3) diabetes specialty outreach clinics, 4) diabetes group care specific for this population and 5) community-based pharmacy interventions.

CONCLUSIONS

Providers and organizations in different cities face similar challenges in providing diabetes care to individuals who are experiencing homelessness, yet they tend to address these difficulties in isolation. Despite this, numerous organizations have created innovative solutions to improve diabetes care. Sharing experiences across organizations and jurisdictions can facilitate development and implementation of successful program models.

Equipoise in Management of Patients With Acute Symptomatic Carotid Stenosis (Hot Carotid)

Objective

To explore differences in antithrombotic management of patients with acutely symptomatic carotid stenosis ("hot carotid") awaiting revascularization with endarterectomy or stenting (CEA/CAS).

Methods

We used a worldwide electronic survey with practice-related questions and clinical questions about 3 representative scenarios. Respondents chose their preferred antithrombotic regimen (1) in general, (2) if the patient was already on aspirin, or (3) had associated intraluminal thrombus (ILT) and identified clinical/imaging factors that increased or decreased their enthusiasm for additional antithrombotic agents. Responses among different groups were compared using multivariable logistic regression.

Results

We received 668 responses from 71 countries. The majority favored CT angiography (70.2%) to evaluate carotid stenosis, CEA (69.1%) over CAS, an aspirin-containing regimen (88.5%), and a clopidogrel-containing regimen (64.4%) if already on aspirin. Whereas diverse antithrombotic regimens were chosen, monotherapy was favored by 54.4%-70.6% of respondents across 3 scenarios. The preferred dual therapy was low-dose aspirin (75-100 mg) plus clopidogrel (22.2%) or high-dose aspirin (160-325 mg) plus clopidogrel if already on aspirin (12.2%). Respondents favoring CAS more often chose ≥2 agents (adjusted odds ratio [aOR] vs CEA: 2.00, 95% confidence interval 1.36-2.95, p = 0.001) or clopidogrel-containing regimens (aOR: 1.77, 1.16-2.70, p = 0.008). Regional differences included respondents from Europe less commonly choosing multiple agents if already on aspirin (aOR vs United States/Canada: 0.57, 0.35-0.93, p = 0.023), those from Asia more often favoring multiple agents (aOR: 1.95, 1.11-3.43, p = 0.020), vs those from the United States/Canada preferentially choosing heparin-containing regimens with ILT (aOR vs rest: 3.35, 2.23-5.03, p < 0.001). Factors increasing enthusiasm for ≥2 antithrombotics included multiple TIAs (57.2%), ILT (58.5%), and ulcerated plaque (57.4%); 56.3% identified MRI microbleeds as decreasing enthusiasm.

Conclusions

Our results highlight the heterogeneous management and community equipoise surrounding optimal antithrombotic regimens for hot carotids.

Cost analysis and efficacy of recruitment strategies used in a large pragmatic community-based clinical trial targeting low-income seniors: a comparative descriptive analysis

OBJECTIVE

One of the most challenging parts of running clinical trials is recruiting enough participants. Our objective was to determine which recruitment strategies were effective in reaching specific subgroups.

STUDY DESIGN AND SETTING

We assessed the efficacy and costs of the recruitment strategies used in the Assessing Outcomes of Enhanced Chronic Disease Care Through Patient Education and a Value-based Formulary Study (ACCESS) in Alberta, Canada.

RESULTS

Twenty percent of the study budget ($354,330 CAD) was spent on recruiting 4013 participants, giving an average cost per enrolled of $88 CAD. Pharmacies recruited the most participants (n = 1217), at a cost of $128/enrolled. "Paid media" had the highest cost ($806/enrolled), whereas "word of mouth" and "unpaid media" had the lowest (~$3/enrolled). Participants enrolled from "seniors outreach" had the lowest baseline quality of life and income, while participants from "word of mouth" had the lowest educational attainment.

CONCLUSION

The "health care providers" strategies were especially successful - at a moderate cost per enrolled. The "media" strategies were less effective, short lasting, and more costly. No strategy was singularly effective in recruiting our targeted groups, emphasizing the importance of utilizing a variety of strategies to reach recruitment goals.

TRIAL REGISTRATION

ClinicalTrials.gov, NCT02579655 . Registered on 19 October 2015.

Interventions for improved diabetes control and self-management among those experiencing homelessness: protocol for a mixed methods scoping review

BACKGROUND

Diabetes is a chronic medical condition that requires patients to be actively engaged in intensive self-management to achieve optimal clinical outcomes. Unfortunately, individuals who are experiencing homelessness often struggle to manage diabetes and consequently suffer numerous and severe complications-both acute and chronic. There are many barriers to optimal diabetes self-management among this population, and this may be exacerbated by the lack of tailoring and customization of care to this unique population. Given this disconnect, it is likely that many organizations have attempted to provide specialized innovations for this population-which may or may not be reported in the formal literature. Our objective is to perform a scoping review to summarize and synthesize the experiences of those who have attempted to provide tailored interventions.

METHODS

We propose a mixed methods scoping review that will include both a formal search of the published literature (MEDLINE, CINAHL, EMBASE, Web of Science, Scopus) and a thorough search of the grey literature. Eligible articles and documents are those that report on an intervention or guideline for the management of diabetes among those experiencing homelessness. All titles and abstracts will undergo duplicate review, as will the full article/document. We will include any report that either includes a description of an intervention or provides recommendations for the treatment of individuals who are homeless with diabetes. We will extract both qualitative and quantitative data for analysis and interpretation. Meta-analysis will not be performed.

DISCUSSION

Those experiencing homelessness who also have diabetes often struggle to manage their chronic condition. When care is tailored to suit their needs, it is feasible that outcomes may be improved. By collating and synthesizing information from diverse organizations and jurisdictions, we hope to facilitate the sharing of knowledge with others who wish to provide this type of care.

Exploring structural barriers to diabetes self-management in Alberta First Nations communities

BACKGROUND

Type 2 diabetes is highly prevalent in Canadian First Nations (FN) communities. FN individuals with diabetes are less likely to receive guideline recommended care and access specialist care. They are also less likely to be able to engage in optimal self-management behaviours. While the systemic and racial contributors to this problem have been well described, individuals' experiences with structural barriers to care and self-management remain under-characterized.

METHODS

We utilized qualitative methods to gain insight into the structural barriers to self-management experienced by FN individuals with diabetes. We conducted a qualitative descriptive analysis of a subcohort of patients with diabetes from FN communities (n = 5) from a larger qualitative study. Using detailed semi-structured telephone interviews, we inquired about participants' diabetes and barriers to diabetes self-management. Inductive thematic analysis was performed in duplicate using NVivo 10.

RESULTS

The structural barriers faced by this population were substantial yet distinct from those described by non-FN individuals with diabetes. For example, medication costs, which are usually cited as a barrier to care, are covered for FN persons with status. The barriers to diabetes self-management that were commonly experienced in this cohort included transportation-related difficulties, financial barriers to uninsured health services, and lack of accessible diabetes education and resultant knowledge gaps.

CONCLUSIONS

FN Albertans with diabetes face a myriad of barriers to self-management, which are distinct from the Non-FN population. In addition to the barriers introduced by colonialism and historical injustices, finances, geographic isolation, and lack of diabetes education each impede optimal management of diabetes. Programs targeted at addressing FN-specific barriers may improve aspects of diabetes self-management in this population.

Clinical factors contributing to high cost hospitalizations in a Canadian tertiary care centre

Background

Like much of the developed world, healthcare costs in Canada are rising. A small proportion of patients account for a large proportion of healthcare spending and much of this spending occurs in acute care settings. The purpose of our study was to determine potentially modifiable factors related to care processes that contribute to high-cost admissions.

Methods

Using a mixed-methods study design, factors contributing to high-cost admissions were identified from literature and case review. We defined pre- and post-admission factors contributing to high-cost admissions. Pre-admission factors included reason for admission (e.g. complex medical, elective surgery, trauma, etc.). Post-admission factors included medical complications, disposition delays, clinical services delays, and inefficient clinical decision-making. We selected a random sample of admissions in the top decile of inpatient cost from the Ottawa Hospital between January 1 and December 31, 2010. A single reviewer classified cases based on the pre- and post-admission factors. We combined this information with data derived from the Ottawa Hospital Data Warehouse to describe patient-level clinical and demographic characteristics and costs incurred.

Results

We reviewed 200 charts which represents ~5% of all high cost admissions within the Ottawa Hospital in 2010. Post-admission factors contributing to high-cost admissions were: complications (60%), disposition delays (53%), clinical service delays (39%), and inefficient clinical decision-making (13%). Further, these factors varied substantially across service delivery lines. The mean (standard deviation (SD)) cost per admission was $49,923 CDN ($45,773). The most common reason for admission was “complex medical” (49%) and the overall median (IQR) length of stay was 27 (18–48) days. Approximately 1 in 3 high cost admissions (29%) included time in the intensive care unit (ICU).

Conclusions

While high cost admissions often include time in ICU and have long lengths of stay, a substantial proportion of costs were attributable to complications and potentially preventable delays in care processes. These findings suggest opportunities exist to improve outcomes and reduce costs for this diverse patient population.