Table 2.

Sociodemographic and Clinical Characteristics Associated with Changing from Nonadherent to Statins before Hospitalization for Acute Myocardial Infarction to Adherent to Statins After Hospital Discharge (N=2,408).^*

Characteristic	Unadjusted RR (95% CI)	Adjusted† RR (95% CI)
Age, in years
65–74	1 (ref)	1 (ref)
75–84	1.07 (0.96 , 1.20 )	1.07 (0.96 , 1.20 )
85+	0.97 (0.83 , 1.13 )	0.96 (0.82 , 1.13 )
Female gender	1.00 (0.90 , 1.11 )	1.01 (0.90 , 1.12 )
Non-white race/ethnicity	0.85 (0.74 , 0.98 )	0.86 (0.73 , 1.01 )
Eligible for low-income subsidy	0.99 (0.89 , 1.10 )	1.13 (1.01 , 1.27 )
Urban residence	1.00 (0.90 , 1.12 )	1.01 (0.90 , 1.13 )
Area-level income, $
<30,000	1 (ref)	1 (ref)
30,000-<75,000	1.13 (1.00 , 1.28 )	1.09 (0.96 , 1.24 )
75,000+	1.25 (1.00 , 1.55 )	1.26 (1.00 , 1.59 )
Comorbidity
Coronary heart disease	0.79 (0.72 , 0.88 )	0.81 (0.73 , 0.91 )
Diabetes mellitus	0.82 (0.74 , 0.91 )	0.87 (0.78 , 0.97 )
Chronic kidney disease	0.86 (0.76 , 0.98 )	0.91 (0.79 , 1.05 )
Depression	0.88 (0.75 , 1.04 )	0.89 (0.75 , 1.06 )
Dementia	0.86 (0.71 , 1.03 )	0.85 (0.70 , 1.03 )
Number of medication classes before MI
<5	1 (ref)	1 (ref)
5 – 9	0.83 (0.68 , 1.01 )	0.88 (0.72 , 1.08 )
≥10	0.75 (0.62 , 0.90 )	0.85 (0.69 , 1.04 )
Before hospitalization PDC<50%	0.72 (0.64 , 0.80 )	0.71 (0.63 , 0.79 )
CABG during hospitalization	1.14 (0.96 , 1.35 )	1.02 (0.86 , 1.21 )
Receive home health services	0.99 (0.87 , 1.12 )	1.14 (0.99 , 1.30 )

Abbreviations: RR, relative risk; AMI, acute myocardial infarction; PDC, proportion of days covered; CABG, coronary artery bypass graft surgery

^*Analyses were conducted using the primary definition of adherence in which patients were categorized as adherent if PDC ≥80%.

^†Adjusted analyses include all the variables listed in the table.