Table 2.

Correlation of medication adherence (Morisky score) with depression, beliefs about medication, knowledge of hypertension, or income by site and in the pooled data.

Parameter	Korle Bu		Port Harcourt		Lagos		Ibadan		Pooled
	r	P	r	P	r	P	r	P	r	P
Depression	−0.230	0.012	0.051	0.667	−0.043	0.705	−0.035	0.749	−0.203	0.000
(PHQ-9)
BMQ-necessity	0.142	0.124	−0.079	0.507	0.091	0.433	0.002	0.984	−0.087	0.103
BMQ-concern	−0.148	0.111	−0.286	0.014	−0.014	0.905	−0.336	0.002	−0.355	0.000
BMQ-necessity-concern	0.215	0.020	0.174	0.141	0.079	0.505	0.210	0.060	0.337	0.000
Hypertension knowledge scale	0.024	0.797	0.212	0.071	0.019	0.865	−0.030	0.783	0.144	0.006
Income	0.139	0.143	−0.057	0.634	−0.200	0.081	0.099	0.419	−0.067	0.226

BMQ-concern: beliefs about medication concern score; BMQ-necessity: beliefs about medication necessity score; BMQ-necessity-concern: beliefs about medication necessity-concern score; P = P value; r = Pearson's correlation coefficient.