Fig. 5From: Oral magnesium supplementation for insomnia in older adults: a Systematic Review & Meta-AnalysisForest plot comparison of magnesium supplementation compared to placebo for sleep onset latency (SOL) outcome. N.B.: Inverse-variance weight method applied; Sleep onset latency converted to same unit (minutes); Statistical tests for heterogeneity (Chi2 and I2) can be unreliable with small sample sizes – heterogeneity explored using other strategiesBack to article page