Table 3. Effect of zinc on diarrhoea related and acute lower respiratory infection related admission to hospital Disease Intervention Comparison Rate ratio (95% CI)* Difference in mean rates (95% CI) Diarrhoea:   Child years observed 5866 6015   Admissions  478  622   Unadjusted admission rate 8.15 10.34 0.76 (0.59 to 0.98) 2.2 (0.04 to 4.5) Acute lower respiratory infection:   Child years observed 5866 6015   Admissions  296  360   Unadjusted admission rate 5.05 5.99 0.81 (0.53 to 1.23) 0.9 (1.8 to 3.6) * Based on individual level analysis using random effect Poisson regression model. Adjusted for child's age, sex, and birth order, mother's education, household homestead land size, baseline cluster level diarrhoea admission rates, and intra-cluster correlation. Based on cluster level t test analysis. Differences in mean rates expressed per 100 child years of observation. Adjusted for child's age, sex, and birth order, mother's education, household homestead land size, and baseline cluster level diarrhoea admission rates.