Table 2

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

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[33,40,42-45,47,49,55-58,61,63,64]

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


Imdad and Bhutta BMC Public Health 2011 11(Suppl 3):S22   doi:10.1186/1471-2458-11-S3-S22

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