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Table 2 Methodological quality of studies on the impact of Ghana’s national health insurance scheme on OOPE(s) and financial catastrophe (1 = Yes; 0 = No)

From: Evaluating the impact of the national health insurance scheme of Ghana on out of pocket expenditures: a systematic review

Study Clear study aims Adequate sample size(justification) Representative sample(with justification) Clear inclusion & exclusion criteria Reliability & validity of measures justified Adequate description of the data Appropriate statistical analysis Discussion of generalizability a Total score (J.S.O, S.E) a Quality based on total score (J.S.O) a Quality based on total score (S.E) b Quality based on outcomes
Chankova et al., 2008 1 0 0 0 0 1 1 1 4 Low Low Low
Nguyen et al., 2011 0 1 1 1 1 1 1 1 7 High High High
Dalaba et al., 2014 1 1 1 1 0 1 0.5 0.5 5.5 Low Low Low
Abrokwah et al., 2014 0.5 0.5 1 1 0 1 1 0.5 5.5 Moderate Moderate Moderate
Abuosi et al., 2015 1 1 1 1 0 1 1 0 6 Moderate Low Low
Kusi et al., 2015 1 1 1 1 1 1 1 1 8 High High High
Aryeetey et al., 2016 1 1 1 1 1 1 1 1 8 High High High
  1. aThe total score is the average score for the quality items based on each author’s review. Scores less than 5 were considered low, 5–6 moderate, 7–8 high in quality
  2. bBoth authors agreed on the quality assignments based on the outcomes reported on OOPE, CHE, or poverty reduction