Channelling of Statin Use towards Low-Risk Population and Patients with Diabetes

Lifestyle Changes in Relation to Initiation of Antihypertensive and Lipid-Lowering Medication: A Cohort Study

Background Lifestyle modification is a key component of cardiovascular disease prevention before and concurrently with pharmacologic interventions. We evaluated whether lifestyle factors change in relation to the initiation of antihypertensive or lipid-lowering medication (statins). Methods and Results The study population comprised 41 225 participants of the FPS (Finnish Public Sector) study aged ≥40 years who were free of cardiovascular disease at baseline and responded to ≥2 consecutive surveys administered in 4-year intervals in 2000-2013. Medication use was ascertained through pharmacy-claims data. Using a series of pre-post data sets, we compared changes in body mass index, physical activity, alcohol consumption, and smoking between 8837 initiators and 46 021 noninitiators of antihypertensive medications or statins. In participants who initiated medication use, body mass index increased more (difference in change 0.19; 95% CI, 0.16-0.22) and physical activity declined (-0.09 metabolic equivalent of task hour/day; 95% CI, -0.16 to -0.02) compared with noninitiators. The likelihood of becoming obese (odds ratio: 1.82; 95% CI, 1.63-2.03) and physically inactive (odds ratio: 1.08; 95% CI, 1.01-1.17) was higher in initiators. However, medication initiation was associated with greater decline in average alcohol consumption (-1.85 g/week; 95% CI, -3.67 to -0.14) and higher odds of quitting smoking (odds ratio for current smoking in the second survey: 0.74; 95% CI, 0.64-0.85). Conclusions These findings suggest that initiation of antihypertensive and statin medication is associated with lifestyle changes, some favorable and others unfavorable. Weight management and physical activity should be encouraged in individuals prescribed these medications.

Trends in Statin Use in Seniors 1999 to 2013: Time Series Analysis

PURPOSE

To examine HMG-CoA reductase inhibitor (statin) drug dispensing patterns to Nova Scotia Seniors' Pharmacare program (NSSPP) beneficiaries over a 14-year period in response to: 1) rosuvastatin market entry in 2003, 2) JUPITER trial publication in 2008, and 3) generic atorvastatin availability in 2010.

METHODS

All NSSPP beneficiaries who redeemed at least one prescription for a statin from April 1, 1999 to March 31, 2013 were included. Aggregated, anonymous monthly prescription counts were extracted by the Nova Scotia Department of Health and Wellness (Nova Scotia, Canada) and changes in dispensing patterns of statins were measured. Data were analyzed using descriptive analyses and interrupted time series methods.

RESULTS

The percentage of NSSPP beneficiaries dispensed any statin increased from 5.3% in April 1999 to 20.7% in March 2013. In 1999, most NSSPP beneficiaries were dispensed either simvastatin (29.5%) or atorvastatin (28.7%). When rosuvastatin was added to the NSSPP Formulary in August 2003, prescriptions dispensed for simvastatin, lovastatin, pravastatin, and fluvastatin declined significantly (slope change, -0.0027; 95% confidence interval (CI), (-0.0046, -0.0009)). This significant decline continued following the publication of JUPITER (level change, -0.1974; 95% CI, (-0.2991, -0.0957)) and the availability of generic atorvastatin (level change, -0.2436; 95% CI, (-0.3314, -0.1558)). Atorvastatin was not significantly affected by any of the three interventions, although it maintained an overall decreasing trend. Only upon the availability of generic atorvastatin did the upward trend in rosuvastatin use decrease significantly (slope change, -0.0010, 95% CI, (-0.0015, -0.0005)).

CONCLUSIONS

The type and rate of statins dispensed to NSSPP beneficiaries changed from 1999 to 2013 in response to the availability of new agents and publication of the JUPITER trial. The overall proportion of NSSPP beneficiaries dispensed a statin increased approximately 4-fold during the study period. In 2013, rosuvastatin was the most commonly dispensed statin (44.1%) followed by atorvastatin (39.1%).

Childhood adversity as a predictor of non-adherence to statin therapy in adulthood

Purpose

To investigate whether adverse experiences in childhood predict non-adherence to statin therapy in adulthood.

Methods

A cohort of 1378 women and 538 men who initiated statin therapy during 2008–2010 after responding to a survey on childhood adversities, was followed for non-adherence during the first treatment year. Log-binomial regression was used to estimate predictors of non-adherence, defined as the proportion of days covered by dispensed statin tablets <80%. In fully adjusted models including age, education, marital status, current smoking, heavy alcohol use, physical inactivity, obesity, presence of depression and cardiovascular comorbidity, the number of women ranged from 1172 to 1299 and that of men from 473 to 516, because of missing data on specific adversities and covariates.

Results

Two in three respondents reported at least one of the following six adversities in the family: divorce/separation of the parents, long-term financial difficulties, severe conflicts, frequent fear, severe illness, or alcohol problem of a family member. 51% of women and 44% of men were non-adherent. In men, the number of childhood adversities predicted an increased risk of non-adherence (risk ratio [RR] per adversity 1.11, 95% confidence interval [CI] 1.01–1.21], P for linear trend 0.013). Compared with those reporting no adversities, men reporting 3–6 adversities had a 1.44-fold risk of non-adherence (95% CI 1.12–1.85). Experiencing severe conflicts in the family (RR 1.27, 95% CI 1.03–1.57]) and frequent fear of a family member (RR 1.27, 95% CI 1.00–1.62]) in particular, predicted an increased risk of non-adherence. In women, neither the number of adversities nor any specific type of adversity predicted non-adherence.

Conclusions

Exposure to childhood adversity may predict non-adherence to preventive cardiovascular medication in men. Usefulness of information on childhood adversities in identification of adults at high risk of non-adherence deserves further research.

Accumulation of cardiovascular and diabetes medication among apparently healthy statin initiators

Purpose

To characterize accumulation of drug-modifiable cardiovascular (CV) risk factors in statin initiators who had no prior medication or hospitalizations for CV disease or diabetes.

Methods

A cohort of 45-75-year-old statin initiators in Finland with no prior CV diseases, diabetes or medication for these conditions was followed up for 24 months after statin initiation for accumulation of CV and diabetes drugs. The number of drugs was measured semi-annually since the first statin purchase and analyzed by growth mixture modeling.

Results

Of the 11 948 apparently healthy statin initiators, 34% purchased at least one additional CV or diabetes drug during the subsequent 24 months. Of those, 20% redeemed no other CV or diabetes drugs at statin initiation but started to accumulate them after 18 months of follow-up, receiving on average 1.3 other drugs at 24 months. The majority, 59%, redeemed on average 0.5 drugs at statin initiation and accumulated 1.5 drugs by the end of 24-month follow-up. Seventeen percent received 1 additional drug at statin initiation, accumulating on average 3 drugs. The remaining 4% with an average of 2 CV or diabetes drugs at statin initiation redeemed 3.5 additional drugs during the follow-up.

Conclusions

Two years after statin initiation, 2 in 3 apparently healthy initiators could still be defined as such as reflected by CV and diabetes medication use.

Cost-effectiveness of statin treatment for primary prevention in conditions of real-world adherence--estimates from the Finnish prescription register

OBJECTIVE

To estimate the cost-effectiveness of statin therapy for primary prevention of coronary heart disease (CHD) events under real-world adherence.

METHODS

A cost-effectiveness model was applied to estimate the expected 10-year costs and health outcomes (in terms of quality-adjusted life-years, QALYs) associated with and without statin treatment (at defined adherence levels) among hypothetical cohorts of Finnish men and women who were initially without established CHD. Treatment efficacy, cost, and quality of life estimates were obtained from published sources. Long-term treatment adherence was measured based on data from the national prescription register.

RESULTS

At an assumed willingness-to-pay threshold of €20,000 per QALY gained, statin treatment with real-world adherence was cost-effective among the older patient groups when the patients' 10-year CHD risk was as high as 20% and did not seem cost-effective in the youngest age groups. Conversely, statin treatment with full adherence was cost-effective for almost all patient groups with a 10-year CHD risk of at least 15%.

CONCLUSIONS

Even though generic statins are now low-cost drugs, treatment adherence seems to have a major impact on the cost-effectiveness of statin treatment in primary prevention. This finding stresses the importance of making a concerted effort for improving adherence among patients on statin therapy to obtain full benefit of the investment in statins. Therefore, novel cost-effective approaches to improve treatment adherence are warranted.

Trends in statin therapy initiation during the period 2000-2010 in Israel

PURPOSE

The aim of this population-based study is to describe trends in the characteristics and treatment patterns of statin initiators over the first decade of the 21st century.

METHODS

New statin use was studied retrospectively using the database of Maccabi Healthcare Services (MHS), a large Israeli health maintenance organization. Statin initiators were defined as MHS members aged ≥ 30 years who first purchased statins between 2000 and 2010. The starting dose was calculated in simvastatin equivalents based on the World Health Organization's daily defined dose index. Persistence was calculated as the percentage of days covered (PDC) with statins during the first year of therapy.

RESULTS

Statin initiation peaked in 2005 and decreased from 38.6 to 18.6 per 1,000 in the period 2005-2010. The average age at therapy initiation decreased from 58.9 (± 12.0) to 54.5 (± 11.7) years, and the average (SD) baseline low-density lipoprotein cholesterol (LDL-C) decreased from 4.2 (± 1.1) to 4.0 (± 0.9) mmol/l during the study period. Women were on average 3 years older than men at treatment initiation, with a higher baseline LDL-C. Among statin initiators, the prevalence of ischemic heart disease (IHD) decreased from 17.8 to 6.7 %, and diabetes prevalence increased from 8.6 to 15.7 %, peaking in 2008 (18.0 %). The PDC with statins ranged between 52.9 and 57.7 %. Simvastatin use at initiation increased from 27.5 % in 2000 to >90 % since 2002. Starting dose increased from 18.5 (± 8.9) to 24.3 (± 13.7) mg simvastatin equivalent.

CONCLUSIONS

Among the study population, statin initiators were increasingly characterized by a lower cardiovascular risk-namely, younger individuals without IHD and with a lower baseline LDL-C. These trends underscore the important shift towards statin initiation for primary prevention, as well as the need to balance between benefits and the potential side effect of statins.