Missing data in randomized controlled trials testing palliative interventions pose a significant risk of bias and loss of power: a systematic review and meta-analyses.

Meta-analysis of the log OR of the proportion of MD in the intervention compared to the control arm, resulted in an overall OR of 1.04 (95% CI 0.90, 1.20) with highly significant statistical heterogeneity ( I 2 35.9, P = 0.001; Figure 3 ).

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