|Dependent variables||Nurse visited group mean||Comparison group mean||Mean difference||95% confidence interval|
|Birth weight, g||3032.2||3050.4||−18.2||−98.7 to 62.4|
|Emotional/cognitive stimulation (score)||32.3||30.9||1.3||0.4 to 2.2|
Estimating treatment effects: real or the result of chance?
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