Correlation between adherence rates measured by MEMS and self-reported questionnaires: a meta-analysis

Table 1 Basic characteristics of studies investigating the correlation between adherence rates measured by MEMS and SRQs

Author	Year	Disease	Sample Size	Age (years)	Duration (months)	Self-Report Questionnaires	MEMS-Monitored Adherence (%)	Self-Report Adherence (%)	Correlation (r_p or r_s)
Arnsten J.	2001	HIV	133	43	6	Anonymous	53.4	78.1	0.46
Hugen P.W.	2002	HIV	26	39.9	0.5	VAS	91.1	86	0.73
Walsh J.C	2002	HIV	78	-	6	MASRI	92.9	93.3	0.63
Hamilton G.A.	2003	Hypertension	107	58	-	MOS, Morisky, VAS	58.38	81.05	0.26
Oyugi J.H.	2004	HIV	36	35	3	AACTG	90.9	93.5	0.87
Fletcher C.V.	2005	HIV	258	40	12	AACTG	64	82	0.24
Halkitis P.	2005	HIV	300	42	-	Anonymous	90	95	0.32
Jasti S.	2006	Iron deficiency	51	23	-	Anonymous	68.1	76.5	0.35
Byerly M.J.	2008	Schizophrenia	61	44.3	6	BARS	66.81	68.35	0.59
Lu M.	2008	HIV	568	42	1	Anonymous	69.8	78.8	0.55
Zeller A.	2008	Hypertension Diabetes Dysdipidemia	66	62	2.5	ASRQ	79	91.3	0.29

BARS: Brief adherence rating scale; AACTG: Adult AIDS clinical trials group adherence instrument; MEMS: Medication event monitoring systems; MOS: Medical outcomes study; Morisky: Morisky adherence rating scale; VAS: Visual analog scale; MASRI: Medication adherence self-report inventory; ASRQ: Adherence self-report questionnaire; Anonymous: A questionnaire without a specific name in a reviewed article.

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