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Table 4 Associations between adherence (PDC > 80 %*) and socioeconomic factors, cohabitation, duration of treatment and comorbidity, respectively n = 6396**

From: Associations between patients’ risk attitude and their adherence to statin treatment – a population based questionnaire and register study

  Proportion of adherent patients (%) OR crude (95 % CI) P-value OR adj.*** (95 % CI) P-value
Gender      
 Male 2903/3544 (81.9) 1   1  
 Female 2372/2852 (83.2) 1.08 (0.95–1.23) 0.243 1.13 (0.98–1.29) 0.089
Age (years)      
 20–39 47/70 (32.9) 1   1  
 40–59 1429/1781 (80.2) 1.99 (1.19–3.32) 0.009 2.20 (1.28–3.78) 0.004
 60–79 3804/4545 (83.7) 2.51 (1.51–4.16) <0.001 2.61 (1.52–4.47) <0.001
Income      
 Low (1st quartile) 807/957 (84.3) 1   1  
 Medium (2nd + 3rd quartile) 2916/3504 (83.2) 0.92 (0.75–1.12) 0.414 0.93 (0.76–1.15) 0.508
 High (4th quartile) 1555/1933 (80.4) 0.76 (0.62–0.94) 0.011 0.82 (0.65–1.04) 0.098
Highest attained educational level (years)      
  < 10 1474/1757 (83.9) 1   1  
 10–12 2470/2992 (82.6) 0.91 (0.78–1.06) 0.235 0.93 (0.79–1.10) 0.405
  > 12 1256/1551 (81.0) 0.82 (0.68–0.98) 0.028 0.85 (0.71–1.02) 0.088
Cohabitation status      
 Single 1157/1399 (82.7) 1   1  
 Married/cohabiting 4121/4995 (82.5) 0.99 (0.84–1.15) 0.862 1.01 (0.86–1.19) 0.901
Labour market status****      
 Working 2054/2574 (79.8) 1   1  
 Retirement pension 2700/3193 (84.6) 1.37 (1.21–1.59) <0.001 1.32 (1.14–1.52) <0.001
 Not in the workforce 526/629 (83.6) 1.29 (1.03–1.63) 0.030 1.25 (0.99–1.59) 0.064
Duration of statin treatment      
  < 1 year 456/539 (84.6)    1  
 1–2 years 447/547 (81.7) 0.81 (0.59–1.12) 0.205 0.82 (0.59–1.14) 0.244
 2–5 years 2490/3089 (80.6) 0.76 (0.59–0.97) 0.029 0.74 (0.57–0.96) 0.024
 5–10 years 1290/1526 (84.5) 0.99 (0.76–1.31) 0.971 0.95 (0.72–1.27) 0.741
  > 10 years 597/695 (85.9) 1.12 (0.81–1.52) 0.523 1.02 (0.73–1.41) 0.924
Comorbidity      
 CVD      
 No CVD 4366/5340 (81.8) 1   1  
 CVD 914/1056 (86.6) 1.43 (1.19–1.74) <0.001 1.36 (1.11–1.67) 0.003
Charlson      
 None 2858/3593 (81.8) 1   1  
 1 1240/1491 (83.2) 1.10 (0.93–1.29) 0.256 1.00 (0.84–1.18) 0.984
  ≥ 2 1089/1289 (84.5) 1.21 (1.02–1.44) 0.032 1.07 (0.89–1.28) 0.464
  1. *Adherence was defined as a PDC (proportion of days covered) above 80 %
  2. **Up to 1.5 % of the data were missing in registers
  3. ***We adjusted for age group, Charlson Comorbidity Index and CVD, highest attained educational level, cohabitation status and duration of statin treatment
  4. ****Labour market status was not adjusted for age group because of the close correlation
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