Table 4.

Adjusted prevalence ratios^abetween older adults classified as low adherence^bto treatment according to the Brief Medical Questionnaire with the factors of the study. Bagé, RS, Southern Brazil, 2008. (N = 1,242)

Variable		n	% Low adherence	Adjusted PR	95%CI	pc
Age (years) (N = 1,242)						0.052
	60 to 64	307	26.4	1	1
	65 to 74	562	32.2	1.25	1.00;1.56
	75 or more	373	25.5	1.01	0.78;1.31
Private health insurance (N = 1,236)						0.028
	No	792	31.1	1.00	1
	Yes	444	25.0	0.81	0.67;0.98
Source of medication (N = 1,241)						< 0.001
	Health care center	465	24.1	1	1
	Pay for	558	25.3	1.07	0.86;1.33
	Partly at the health care center and partly paid for	218	47.7	1.97	1.59;2.44
Number of reported morbidities (N = 1,242)d						0.012
	0	226	23.5	1	1
	1	305	27.2	1.04	0.78;1.40
	2	333	26.1	1.09	0.81;1.46
	3 or +	378	35.4	1.39	1.06;1.82
IADL Incapacity (N = 1,238)e						0.011
	No	810	26.2	1	1
	Yes	428	33.2	1.25	1.05;1.49
Number of medications used (N = 1,241)						< 0.001
	1	300	3.7	1	1
	2	291	24.7	6.50	3.52;12.01
	3 or +	650	42.0	10.18	5.65;18.33

^aVariables shown are those with 5% level of significance after adjusted analysis using Poisson regression.

^bNon adherents = Low adherence according to BMQ (3 or + positive responses).

^c Wald test.

^dHypertension, diabetes, stroke, lung problems, cancer, spinal problems, kidney problems, rheumatism.

^eInstrumental activities of daily living.