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Table 3 Analysis of CMA by covariates in relation to generic substitution (n = 95,168)

From: Effects of generic substitution on refill adherence to statin therapy: a nationwide population-based study

Parameter

Difference in estimate (%)

p-value

Gender

  

 Female

(reference)

 Male

1.6

0.0004

Age (years)

  

 18–39

(reference)

 40–49

8.3

<.0001

 50–59

13.0

<.0001

 60–69

16.7

<.0001

 70-79

17.8

<.0001

 80–

-

-a

Level of education

  

 Primary school

(reference)

 Secondary school

−0.3

0.6

 University

−0.3

0.6

Background

  

 Swedish

(reference)

 Migrant

−4.4

<.0001

Drugs prior to index

  

 0

(reference)

 1

−0.8

0.3

 2–4

−0.1

0.9

 5–

1.8

0.003

Previous cardiovascular disease

  

 No

(reference)

 Yes

12.8

<.0001

Pharmacological diabetes treatment

  

 None

(reference)

 Insulin only

0.0

1.0

 Oral antidiabetics only, or both insulin and oral antidiabetics

3.6

<.0001

  1. Differences in continuous measure of medication acquisition (CMA) by exposure to generic substitution by each covariate analysed with ANCOVA. The first class of each covariate is used as a reference ( N = 95,168, whereof 88,773 new simvastatin users).
  2. aData on educational level was not available for individuals 80 years and older. Thus, this age group was excluded from the analysis.