Table 2.

Univariate comparison of health beliefs in adherent and non-adherent patients (n = 350)

Item	Refill adherence <90%(n = 78)	Refill adherence ≥90%(n = 272)
Health Belief Model scale
Perceived susceptibility score	6.8 ± 2.0	6.8 ± 1.9
Perceived severity score	7.2 ± 2.0	7.3 ± 1.7
Perceived benefits score	4.0 ± 1.8**	3.6 ± 1.4
Perceived barriers score	7.8 ± 2.5	7.6 ± 2.4
Perceived quality of medical care score	2.9 ± 1.5	2.8 ± 1.3
Health Locus of Control scale
Internal locus of control score	26.4 ± 5.4	26.8 ± 4.9
Powerful others locus of control score	25.2 ± 5.5	25.6 ± 5.9
Chance locus of control score	18.0 ± 6.8	17.5 ± 6.4
Beliefs About Medicine Questionnaire
Necessity score	19.7 ± 4.1	20.5 ± 3.2
Concerns score	12.3 ± 3.9	12.2 ± 3.8
Perceived Stress scale score	8.0 ± 3.6	7.7 ± 3.2
Morisky scale score >0	49.4**	35.2
†Have you changed your daily routine to accommodate your medication schedule?	66.2*	76.2

Data presented as mean ± SD or %. Two-sided Student's t-test used for comparison of means and χ² test used for comparison of proportions.

^†Results are listed as the proportion answering ‘yes’ to the question.

^*P = 0.10;

^**P = 0.05.