Table 2.

Results of Measures of Self-Reported and Pharmacy Refill-Based Medication Adherence for the Overall Sample and CKD, KF Sub-Groups

Results of Test Instruments	Overall Population	CKD	KF	p-value*
	N= 113	N=60	N=53
Self-reported Morisky medication adherence score	6.5 ± 1.4	6.8 ± 1.2	6.1 ± 1.5	0.026
Category of adherence based on Morisky medication adherence score
High adherence (score = 8)	29.2%	35.0%	22.6%	0.229
Medium adherence (score 6 to <8)	39.8%	40.0%	39.6%
Low adherence (score <6)	31.0%	25.0%	37.7%
MPR for antihypertensive medications	0.89 ± 0.15	0.91 ± 0.15	0.85 ± 0.15	0.008
Lower adherence as a category based on MPR of antihypertensive medications (<0.8)	26.0%	18.2%	35.6%	0.049
PDC for antihypertensive medications	0.85 ± 0.14	0.88 ± 0.14	0.82 ± 0.13	0.004
Lower adherence as a category based on PDC of antihypertensive medications (<0.8)	32.0%	18.2%	48.9%	0.001
MPR for cardiometabolic medications including statins	0.90 + 0.17	0.92 ± 0.15	0.88 ± 0.19	0.175
Lower adherence as a category based on MPR of cardiometabolic medications (<0.8)	18.5%	14.0%	23.7%	0.261
PDC for cardiometabolic medications including statins	0.87 ± 0.15	0.89 ± 0.14	0.85 ± 0.16	0.289
Lower adherence as a category based on PDC of cardiometabolic medications (<0.8)	18.5%	14.0%	23.7%	0.261

Notes: *p-value indicates the significance of difference between CKD and KF patients calculated by rank-sum test for continuous variables and chi-square test for categorical variables. p values <0.05 are printed in bold.

Abbreviations: CKD, Chronic kidney disease; KF, Kidney Failure; MPR, Medication possession ratio; PDC, Proportion of days covered.