Variables being

investigated

Study

Measurement of medication adherence

Study setting and sample size

Dissatisfaction with the health care services received

Barreto et al. [60]

Morisky-Green test

Brazil; N = 68

Lubaki et al. [49]

Qualitative

Congo

Kusuma [58]

Qualitative

Delhi

Odusola et al. [40]

Qualitative

Nigeria

Inadequate information from health care Centre

Hussain et al. [34] .

Questionnaire

Bangladesh; N = 120

Dissatisfaction with treatment

Al-Ramahi et al. [38] .

MMAS 8

Palestine; N = 450

Fewer Interaction with physicians

Hussain et al. [34]

Questionnaire

Bangladesh; N = 120