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Table 3 Meta-analysis results

From: Does zinc with and without iron co-supplementation have effect on motor and mental development of children? A systematic review and meta-analysis

Outcomes by time points of BSID assessments Number of Trials Sample Size SMD (95% CI) Heterogeneity Statistics
Zinc Alone vs. Placebo     
6 Months:     
MDI 4 591 -0.18 (−0.39 to 0.02)a I2 = 37.4%, Χ2 = 4.79
PDI 4 591 0.17 (−0.20 to 0.55) I2 = 80.8%, Χ2 = 15.60
12 Months:     
MDI 6 977 -0.08 (−0.36 to 0.19) I2 = 77.4%, Χ2 = 22.14
PDI 6 977 0.30 (−0.24 to 0.83) I2 = 94.00%, Χ2 = 80.23
Zinc with Iron vs. Iron     
6 Months:     
MDI 2 359 0.09 (−0.11 to 0.30) I2 = 0.00, Χ2 = 0.01
PDI 2 359 0.07 (−0.14 to 0.28) I2 = 0.00, Χ2 = 0.42
12 Months:     
MDI 4 790 -0.03 (−0.17 to 0.11) I2 = 0.00, Χ2 = 1.02
PDI 4 790 0.01 (−0.24 to 0.26) I2 = 66.40, Χ2 = 8.94
  1. a Significant at 10% level