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Table 3 Treatment persistence and medication possession ratio administered by group

From: Treatment persistence and adherence and their consequences on patient outcomes of generic versus brand-name statins routinely used to treat high cholesterol levels in Spain: a retrospective cost-consequences analysis

Group

Brand-name

Generic

Total

p

Number of patients (%)

3007 (22.7%)

10, 237 (77.3%)

13,244 (100%)

Time since diagnosis (months)

2.2 (2.4)

2.2 (2.3)

2.2 (2.4)

0.892

 Median (P25–P75)

2.0 (1.0–3.0)

2.0 (1.0–3.0)

2.0 (1.0–3.0)

 

Treatment possession (months)

22.3 (20.2)

19.6 (21.7)

20.2 (21.2)

< 0.001

 Median (P25–P75)

21.0 (12.0–44.0)

19.0 (10.0–38.0)

20.0 (10.0–42.0)

 

Treatment duration (months)

34.2 (20.5)

32.0 (20.2)

32.5 (20.3)

< 0.001

 Median (P25–P75)

31.0 (15.0–60.0)

29.0 (14.0–55.0)

29.0 (14.0–56.0)

 

Medication Possession Ratio

 Average

65.1%

61.5%

62.3%

< 0.001

 95% CI

63.8–66.2%

60.1–62.2%

61.8–62.9%

 

Percentage of patients on treatment at different cut-off point

Treatment persistence (HR [95% CI])a

 12 months

80.3%

77.7%

78.3%

0.81 [0.74–0.89], p < 0.001

 24 months

60.9%

56.9%

57.8%

0.93 [0.87–0.99], p = 0.021

 60 months

25.9%

20.7%

21.9%

0.86 [0.82–0.91], p < 0.001

  1. Values expressed as percentage or mean (SD standard deviation), p brand-name vs. generic, CI confidence interval, P25 25th percentile, P75 75th percentile
  2. aHR adjusted hazard ratio relative to brand-name statin (adjusted using a Cox proportional risk model with covariates (age, sex, number of comorbidities, Charlson index, resource utilization band, proportion of subjects reaching their LDL-cholesterol goal at the start of therapy, statin type and prior cardiovascular event); P percentile