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Table 2 Qualitative assessment of Trials for effect of zinc supplementation on linear growth

From: Effect of preventive zinc supplementation on linear growth in children under 5 years of age in developing countries: a meta-analysis of studies for input to the lives saved tool

Quality Assessment Summary of findings
     Generalizability Pooled Effect Qualitative Assessment
No. of studies Design Limitations Consistency Generalizability to Population of Interest Generalizability to intervention of Interest Mean Difference ( 95 % CI) High, moderate, low, very low)
Effect of Zinc supplementation on linear growth: Zinc supplementation for a dose of 10 mg/day for a duration of 24 weeks
15[33, 40, 4245, 47, 49, 5558, 61, 63, 64] RCT In one study [49], dose was not exact 10 mg/day but was 12.5 mg/day. Supplementation in one study continued till 28 weeks [43]. Heterogeneity 71 %. Random effect models used. All the studies from developing countries 10 mg zinc/day for 24 weeks 0.37(0.12-0.62) cm Moderate