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Table 2 Independent effect of baseline characteristics on odds of adequate visit adherencea

From: Clinical and demographic correlates of medication and visit adherence in a large randomized controlled trial

  Odds ratio (95 % CI) - Multiple logistic regression
Baseline characteristic Full model Reduced model
  (N = 30,262) P-value (N = 30,262) P-value
Male 1.07 (1.01–1.13) 0.033 1.07 (1.01–1.13) 0.029
Age (55–64 is reference group)     
 65–74 1.38 (1.30–1.48) <0.001 1.37 (1.29–1.46) <0.001
 ≥75 1.34 (1.24–1.46) <0.001 1.32 (1.22–1.43) <0.001
Race and Ethnicity (Black is reference group)     
 Non-Black Hispanic 0.94 (0.87–1.02) 0.126 0.94 (0.87–1.01) 0.100
 Non-Black Non-Hispanic 1.98 (1.86–2.11) <0.001 2.00 (1.88–2.13) <0.001
Education (High school is reference group)     
 < High school 0.96 (0.90–1.02) 0.195   
 Beyond high school 1.01 (0.94–1.09) 0.741   
Has Diabetes 0.92 (0.87–0.98) 0.010 0.92 (0.87–0.98) 0.010
Smoking (Current is ref group)     
 Past 1.19 (1.10–1.28) <0.001 1.19 (1.11–1.29) <0.001
 Never 1.12 (1.04–1.20) 0.004 1.12 (1.04–1.21) 0.003
Self-assessed baseline health (Excellent is reference group)     
 Very good 0.91 (0.80–1.03) 0.137 0.91 (0.80–1.03) 0.131
 Good 0.89 (0.79–1.00) 0.050 0.88 (0.78–1.00) 0.042
 Fair 0.80 (0.70–0.91) <0.001 0.79 (0.70–0.90) <0.001
 Poor 0.52 (0.43–0.62) <0.001 0.51 (0.43–0.61) <0.001
 Unknown 0.61 (0.42–0.89) 0.010 0.60 (0.41–0.88) 0.009
Practice type (Private is reference group)     
 Group 1.23 (1.13–1.33) <0.001 1.23 (1.14–1.33) <0.001
 HMO 0.58 (0.51–0.66) <0.001 0.58 (0.51–0.66) <0.001
 Community Health Center 1.04 (0.95–1.15) 0.406 1.04 (0.94–1.15) 0.434
 University 1.56 (1.41–1.73) <0.001 1.56 (1.41–1.72) <0.001
 Other 1.15 (1.04–1.27) 0.008 1.15 (1.04–1.27) 0.007
 VAMC 2.00 (1.82–2.19) <0.001 2.00 (1.82–2.20) <0.001
 Unknown 0.41 (0.37–0.47) <0.001 0.41 (0.37–0.47) <0.001
Baseline medications (Untreated is reference group)     
 On drug therapy < 2 months 1.41 (1.30–1.54) <0.001 1.42 (1.30–1.54) <0.001
 On drug therapy ≥ 2 months 1.10 (0.94–1.28) 0.233 1.10 (0.94–1.28) 0.222
HDL Cholesterol < 35 mg/dl 1.09 (1.00–1.19) 0.052 1.09 (1.00–1.19) 0.048
Taking aspirin 1.20 (1.13–1.27) <0.001 1.20 (1.13–1.27) <0.001
Possible disability 2.04 (1.88–2.21) <0.001 2.03 (1.87–2.20) <0.001
ASCVD (No ASCVD is reference group)     
 Yes 0.90 (0.84–0.97) 0.003 0.90 (0.84–0.96) 0.003
 Sub–clinical 1.03 (0.96–1.11) 0.447 1.03 (0.95–1.11) 0.483
BMI > 30 1.02 (0.97–1.08) 0.453   
Decile of clinic enrollment volume 1.03 (1.02–1.04) <0.001 1.03 (1.02–1.04) <0.001
Randomized treatment group (Chlorthalidone is reference group)     
 Amlodipine 1.01 (0.95–1.07) 0.774 1.01 (0.95–1.07) 0.782
 Lisinopril 0.84 (0.79–0.90) <0.001 0.84 (0.79–0.90) <0.001
  1. aVisit Adherence is a dichotomous variable defined as poor if the patient’s “% visit adherence” was < 80 % and adequate if adherence was ≥ 80 %