Table 4

Logistic Regression Models for Multivariate Predictors of Unintentional Non-Adherence (N = 24,017)
Forget to Take Medication Run Out of Medication Careless at Times Taking Medication Anyunintentional non-adherence
OR CI OR CI OR CI OR CI
Age
40–49 1.71* 1.52–1.93 2.21* 1.94–2.51 1.47* 1.28–1.68 1.95* 1.71–2.23
50–59 1.57* 1.44–1.72 2.00* 1.81–2.20 1.24* 1.11–1.37 1.78* 1.62–1.95
60–64 1.45* 1.32–1.58 1.61* 1.46–1.78 1.17 1.05–1.30 1.53* 1.39–1.68
65–69 1.28* 1.17–1.40 1.29* 1.16–1.43 1.14^ 1.02–1.27 1.31* 1.20–1.44
Female gender .89* .84–.94 .97 .91–1.03 1.04 .97–1.11 .91 .85–.97
White race .90 .80–1.02 .74* .66–.84 .85^ .75–.96 .88 .77–1.01
Education
High school or less .79* .72–.87 .78* .70–.85 .77* .69–.85 .75* .68–.82
Some college .94 .88–1.01 .93 .86–1.00 .91^ .84–.99 .93 .86–1.00
College degree .93 .86–1.02 .93 .85–1.01 .90^ .82–.99 .93 .85–1.02
Employment status
Looking for a job .90 .76–1.06 1.04 .88–1.23 .95 .79–1.14 .95 .78–1.16
Not looking for a job .74* .67–.83 .67* .60–.75 .75* .67–.85 .68* .61–.77
Retired .78* .73–.84 .67* .62–.72 .75* .69–.81 .72* .67–.78
Disabled .82^ .68–.98 .84 .70–1.01 .86 .70–1.05 .79^ .64–.97
Income
< 25 K .99 .90–1.09 1.74* 1.58–1.94 1.07 .96–1.20 1.21* 1.09–1.35
≥ 25K < 50K .98 .90–1.06 1.35* 1.24–1.46 1.06 .97–1.16 1.09^ 1.00–1.18
≥50K < 75K 1.05 .97–1.14 1.20* 1.10–1.30 1.03 .94–1.13 1.12^ 1.03–1.22
≥75K < 100K .98 .89–1.07 1.05 .95–1.16 1.07 .97–1.19 1.00 .91–1.10
Self-Rated Health
Poor/fair 1.16* 1.07–1.25 1.70* 1.57–1.85 1.60* 1.46–1.76 1.31* 1.21–1.42
Good 1.18* 1.10–1.26 1.34* 1.24–1.45 1.33* 1.22–1.45 1.25* 1.16–1.34
Disease
Asthma .92 .83–1.03 1.36* 1.21–1.52 1.18 1.05–1.33 1.18 1.04–1.33
Diabetes 1.37* 1.26–1.50 1.23* 1.12–1.34 1.36* 1.24–1.50 1.38* 1.25–1.52
Hyperlipidemia 1.05 .97–1.13 .96 .89–1.04 1.08 .99–1.17 1.06 .98–1.14
Osteoporosis 1.18* 1.08–1.30 1.47* 1.34–1.61 1.30* 1.17–1.43 1.31* 1.19–1.45
Depression .97 .85–1.10 .94 .82–1.09 1.14 .98–1.33 .95 .83–1.08
Perceived Need for Medication
Quartile 1 1.46* 1.33–1.60 1.41* 1.27–1.55 1.91* 1.72–2.13 1.47* 1.32–1.62
Quartile 2 1.46* 1.35–1.57 1.38* 1.26–1.50 1.55* 1.41–1.70 1.51* 1.39–1.64
Quartile 3 1.32* 1.23–1.43 1.22* 1.20–1.32 1.34* 1.22–1.47 1.33* 1.22–1.44
Perceived Medication Affordability
Quartile 1 1.29* 1.18–1.41 4.65* 4.24–5.11 1.34* 1.21–1.48 2.32* 2.10–2.55
Quartile 2 1.21* 1.11–1.31 2.30* 2.10–2.52 1.23* 1.12–1.36 1.42* 1.31–1.55
Quartile 3 1.16* 1.08–1.25 1.55* 1.42–1.69 1.10^ 1.01–1.21 1.23* 1.14–1.32
Perceived Medication Concerns
Quartile 1 1.25* 1.13–1.38 1.06 .95–1.17 1.25* 1.11–1.39 1.27* 1.14–1.41
Quartile 2 1.20* 1.11–1.30 1.01 .93–1.11 1.18 1.08–1.31 1.19* 1.09–1.30
Quartile 3 1.20* 1.11–1.30 1.00 .92–1.09 1.14 1.03–1.25 1.19* 1.10–1.29

* p < 0.001; p < 0.01; ^ p < 0.05.

Reference Categories for each of the variables in the model were as follows: age 70 and up (Age); male (Gender); non-white (Race); greater than college degree (Education); currently employed (Employment); income > =100K (Income); very good/excellent (Self-rated health); hypertension (Disease); quartile 4 (Perceived need, Perceived affordability, Perceived concerns).

Gadkari and McHorney

Gadkari and McHorney BMC Health Services Research 2012 12:98   doi:10.1186/1472-6963-12-98

Open Data