Use of sodium-glucose cotransporter 2 inhibitors in Alberta adults with chronic kidney disease: a cross-sectional study identifying care gaps to inform knowledge translation

Efficacy and safety of dapagliflozin in patients with CKD: real-world experience in 93 Italian renal clinics

Background

Sodium-glucose co-transporter-2 inhibitors (SGLT2i) are recommended for reducing the renal and cardiovascular risk in patients with chronic kidney disease (CKD) based on the positive results reported by clinical trials. However, real-world data on the efficacy and the safety of these drugs in CKD population followed in nephrology setting are lacking.

Methods

We report the effects of dapagliflozin in CKD patients by using data collected during a learning program in which 105 nephrologists added dapagliflozin (10 mg/day) to consecutive patients referred to their renal clinics. Efficacy endpoints were the albuminuria change and the determinants of an albuminuria decline ≥30%. Adverse events were also collected.

Results

A total of 1724 patients with CKD (age 67.4 ± 13.2 years, 72.8% males, diabetes 59.9%, eGFR 43.5 ± 17.4 ml/min/1.73 m2, severe albuminuria 70.1%) received dapagliflozin for 4 ± 1 months. Dapagliflozin significantly reduced body weight (-1.3 kg), eGFR (-0.27 ml/min/month), and blood pressure (-3.6/-1.7 mmHg). Albuminuria declined by 25.1% (95%CI 23.0-27.2) from 500 mg/day [IQR 225-1425] to 320 mg/day [IQR 100-900]. Albuminuria reduction was ≥30% in 48.3% of patients, 0-29% in 37.6% while it increased in 14.1% of patients. At logistic regression analysis, older age, female sex, use of mineralocorticoid receptor antagonist, higher eGFR, and higher albuminuria were all significant predictors of albuminuria decline ≥30%. We collected 46 side effects leading to drug discontinuation in 36 patients (2%), with acute kidney injury and urinary tract infection being the most frequent adverse events.

Conclusions

We provide evidence of the anti-proteinuric efficacy of short-term dapagliflozin in the presence of good safety profile in patients with CKD followed in nephrology.

Real-Time Use of SGLT2i Verified in Pre-dialysis: The RSVP Cross-sectional Study

BACKGROUND

The use of sodium-glucose cotransporter 2 inhibitors (SGLT2i) in nephrology practice is increasingly becoming standard of care in patients with diabetes or those with proteinuria.

OBJECTIVES

The primary outcome was to identify the proportion of pre-dialysis patients with chronic kidney disease (CKD) G3a, G3b, or G4 prescribed an SGLT2i and describe their characteristics.

METHODS

This was a retrospective, multicentric, cross-sectional study of patients with CKD followed at 4 pre-dialysis clinics in the province of Quebec, Canada. We collected data of multiple covariates associated with prescribing SGLT2i in patients over 18 years of age with CKD G3a, G3b, or G4. We then performed a multivariate logistic regression to assess their associations.

RESULTS

Of the 874 patients included, 22.7% were prescribed an SGLT2i. Factors most strongly associated included male sex (odds ratio [OR] = 4.88, 95% CI = 2.38-10.03), being prescribed metformin (OR = 4.30, 95% CI = 2.23-8.31), having type 2 diabetes (OR = 4.00, 95% CI = 1.86-8.62), or having an albumin-to-creatinine ratio greater than 300 mg/g (OR = 1.84, 95% CI = 1.08-3.14). The majority of patients (60.4%) had their SGLT2i initiated by the pre-dialysis clinic and the most frequent adverse event was an initial increase in serum creatinine 1 week after starting treatment (33.9%).

CONCLUSION AND RELEVANCE

An increasing number of patients with CKD are being prescribed SGLT2i. Nonetheless, significant disparities in sex, severity of disease, and comorbidities remain. We suggest that specific strategies be put in place to promote prescribing of SGLT2i in women and other at-risk populations, in particular among nephrology teams, to improve patient care.

Use of Sodium-Glucose Cotransporter-2 Inhibitors in Adults Aged ≥65 Years With Type 2 Diabetes and Cardiovascular Disease: A Cross-sectional Study of Different Drug Funding Policies

OBJECTIVES

Sodium-glucose cotransporter-2 inhibitors (SGLT2is) provide heart and kidney benefits in adults with diabetes and cardiovascular disease (CVD). Public drug coverage policies for SGLT2is differ by province in Canada. In this study, we describe the potential effects of prior authorization/step therapy (PA/ST) and relatively high income-based deductibles, compared with regular benefit status with modest copay, on SGLT2i prescriptions in high-risk adults.

METHODS

This investigation was a cross-sectional study of adults ≥65 years of age with type 2 diabetes and CVD and taking at least 1 antihyperglycemic agent from 2019 to 2020. Using electronic medical record data obtained from primary care practices, we compared SGLT2i use (2019 to 2020) in Alberta (PA/ST, modest copay) and Manitoba (PA/ST, relatively high income-based deductible) vs Ontario (regular benefit status, modest copay). Poisson regression was used to adjust for confounders, including age, sex, glycated hemoglobin, and other medication use. Other diabetes medications were estimated as control cases.

RESULTS

We included 3,191 adults (average age 75 years, 31% women). SGLT2i use was lowest in Manitoba (15.6%), followed by Alberta (25.9%), and highest in Ontario (31.9%). After adjustment, compared with Ontario, SGLT2i prescriptions were lower in Alberta (prevalence ratio [PR] 0.80, 95% confidence interval [CI] 0.71 to 0.91, p<0.001) and Manitoba (PR 0.48, 95% CI 0.39 to 0.59, p<0.001).

CONCLUSIONS

PA/ST and relatively high deductibles are associated with reduced SGLT2i prescribing---PA/ST by approximately 20% in Alberta and Manitoba, and relatively high deductibles by an additional relative reduction of 40% in Manitoba. PA/ST and cost-sharing policies should be flexible and responsive to changing evidence of clinical benefit.

Prescription Patterns of Sodium-Glucose Cotransporter-2 Inhibitors in Adults With Type 2 Diabetes and Heart Failure With Reduced Ejection Fracture Admitted to a Tertiary Care Centre in Ontario, Canada

OBJECTIVES

Our aim in this study was to assess early adoption patterns of sodium-glucose cotransporter-2 inhibitors (SGLT2i) in eligible patients with type 2 diabetes (T2DM) and heart failure with reduced ejection fracture (HFrEF), and to identify gaps in practice.

METHODS

A retrospective chart review was conducted of patients with T2DM and HFrEF admitted with decompensated heart failure to The Ottawa Hospital under cardiology or general internal medicine from June 2019 to May 2021. Patterns were assessed at 8-month intervals (1 period before release of the Diabetes Canada 2020 guidelines and 2 periods afterward). Baseline patient characteristics, comorbidities, and prescriber information were collected.

RESULTS

Of the 98 patients who met the inclusion criteria, 36.7% had a prescription for an SGLT2i, either on admission, discharge, or follow-up. Trends showed a gradual increase over time. On admission, 9.8% of patients were on an SGLT2i in period 1, 19.2% in period 2, and 23.3% in period 3. Patients receiving a prescription for SGLT2i on discharge were 0.0% in period 1, 10.0% in period 2, and 9.5% in period 3, all of whom were admitted under cardiology. On follow-up, 13.9% of eligible patients were started on an SGLT2i in period 1, 21.1% in period 2, and 35.0% in period 3. Endocrinology was the main prescriber of SGLT2i in the outpatient setting, followed by cardiology.

CONCLUSIONS

Overall, trends show a slow but steady increase in early prescriptions of SGLT2i. However, most eligible patients were not started on therapy during our study period, with variability in practice between specialties, highlighting opportunities to boost uptake in the future.

Basal Insulin Initiation in Adults With Type 2 Diabetes Mellitus: A Retrospective Cohort Study Using Administrative Health Data in Alberta, Canada

OBJECTIVES

Pharmacologic treatment of type 2 diabetes mellitus (T2DM) follows a stepwise approach. Typically, metformin monotherapy is first-line treatment, followed by other noninsulin antihyperglycemic agents (NIAHAs) or progression to insulin if glycated hemoglobin (A1C) targets are not achieved. We aimed to describe real-world patterns of basal insulin initiation in people with T2DM, and A1C not at target despite treatment with at least 2 NIAHAs.

METHODS

A retrospective cohort study was conducted using administrative health data from Alberta, Canada, among adults with T2DM, indexed on the first test with 7.0% < A1C < 9.5% (April 1, 2011 to March 31, 2019), with at least 2 previous NIAHAs but no insulin. Kaplan-Meier (KM) methodology was used to analyze time to basal insulin initiation, with stratification by index A1C. Annual patient status was categorized into 5 groups: basal insulin initiation, death, NIAHA intensification, no change in therapy (subgroups of A1C <7.1% and A1C ≥7.1% [clinical inertia]), or discontinuance.

RESULTS

The cohort included 14,083 individuals. The KM cumulative probability of initiating basal insulin was 7.7% (95% confidence interval [CI] 7.3% to 8.2%) at 1 year, increasing to 43.1% (95% CI 42.1% to 44.1%) at 8 years of follow-up. Higher A1C levels were associated with greater proportions of basal insulin initiation. By year 8, proportions with NIAHA intensification and clinical inertia were 12.1% and 19.3%, respectively, relative to year 7.

CONCLUSIONS

Despite current clinical practice guidelines recommending achieving A1C targets within 6 months, less than half of the individuals with T2DM and clear indications for basal insulin initiated treatment within 8 years. Efforts to reduce delays in basal insulin initiation are needed.

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.

Identifying Barriers and Facilitators for Increasing Uptake of Sodium-Glucose Cotransporter-2 (SGLT2) Inhibitors in British Columbia, Canada, using the Consolidated Framework for Implementation Research

Background

Care gaps remain in modern health care despite the availability of robust, evidence-based medications. Although sodium-glucose cotransporter-2 (SGLT2) inhibitors have demonstrated profound benefits in improving both cardiovascular and kidney outcomes in patients, the uptake of these medications remain suboptimal, and the causes have not been systematically explored.

Objective

The purpose of this study was to use the Consolidated Framework for Implementation Research (CFIR) to describe the barriers and facilitators faced by clinicians in British Columbia, Canada, when prescribing an SGLT2 inhibitor. To achieve this, we conducted semistructured interviews using the CFIR with practicing family physicians, nephrologists, endocrinologists, and cardiologists in British Columbia.

Design

Semistructured interviews.

Setting

British Columbia, Canada.

Participants

Actively practicing family physicians, nephrologists, endocrinologists, and cardiologists in British Columbia.

Methods

Twenty-one clinicians were interviewed using questions derived from the CFIR. The audio recordings were transcribed verbatim, and each transcription was individually analyzed in duplicate using thematic analysis. The analysis focused on identifying barriers and facilitators to using SGLT2 inhibitors in clinical practice and coded using the CFIR constructs. Once the transcriptions were coded, overarching themes were created.

Results

Five overarching themes were identified to the barriers and facilitators to using SGLT2 inhibitors: current perceptions and beliefs, clinician factors, patient factors, medication factors, and health care system factors. The current perceptions and beliefs were that SGLT2 inhibitors are efficacious and have distinct advantages over other agents but are underutilized in British Columbia. Clinician factors included varying levels of knowledge of and comfort in prescribing SGLT2 inhibitors, and patient factors included intolerable adverse events and additional pill burden, but many were enthusiastic about potential benefits. Multiple SGLT2 inhibitor related adverse events like mycotic infections and euglycemic diabetic ketoacidosis and the difficulty in obtaining reimbursement for these medications were also identified as a barrier to prescribing these medications. Facilitators for the use of SGLT2 inhibitors included consensus among colleagues, influential leaders, and peers in support of their use, and endorsement by national guidelines.

Limitations

The experience from the clinicians regarding costs and the reimbursement process is limited to British Columbia as each province has its own procedures. There may be responder bias as clinicians were approached through purposive sampling.

Conclusion

This study highlights different themes to the barriers and facilitators of using SGLT2 inhibitors in British Columbia. The identification of these barriers provides a specific target for improvement, and the facilitators can be leveraged for the increased use of SGLT2 inhibitors. Efforts to address and optimize these barriers and facilitators in a systematic approach may lead to an increase in the use of these efficacious medications.