Fig. 4

Forest plot for change in level in the period immediately following the introduction of the DHT claims system compared with counterfactual (i.e. the immediate impact of DHT implementation on Health Insurance Claims Rejection Rate). The model is based on moment-based approximations to the expectation of the standard Cochran heterogeneity statistic Q [33] which is a ratio of observed variation to the within-study error. The weight (%) represents relative weights based on the number of subjects from each health facility and should sum to 100. Abbreviations: MEM: Mean Error Margin (or Average claim rejection rate); DL: DerSimonian and Laird