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Table 3 Summary quality assessment of included studies

From: The economic burden of cardiovascular disease and hypertension in low- and middle-income countries: a systematic review

Quality criterion Studies (n, %)
Yes No Unclear
Economic component
 Data sources for expenditure, resource use and unit costs were clearly explained 48 (58%) 34 (42%) n/a
 Cost and/or productivity data were transparently presented 24 (29%) 59 (71%) n/a
 Productivity costs were included 23 (28%) 60 (72%) 0 (0%)
 If productivity costs included, results were presented with and without productivity costs 20 (24%) 3 (4%) n/a
 The analysis addressed uncertainty and/or heterogeneity 53 (64%) 30 (36%) 0 (0%)
Epidemiologic component
 The source of incidence/prevalence data contributed to the study’s internal validity 35 (42%) 13 (16%) 28 (34%)
 The patient sampling method appropriate for deriving nationwide estimates of incidence/prevalence 21 (25%) 49 (58%) 9 (11%)
  1. Total number of studies does not add to n = 83 in all criteria because certain criteria were not applicable in several studies. Please see the Additional file containing the extraction sheet. n/a - not applicable