Calculating prevalence of hepatitis B in India: using population weights to look for publication bias in conventional meta-analysis.

Publication bias can result from the propensity of researchers to document what is unusual. This can distort the inferences drawn in systematic reviews. To measure the distortion, it has been suggested that a second analysis be done; using weights proportional to the size of the population from which the samples are drawn.

Validation of CRIB II for prediction of mortality in premature babies.

Objective: Validation of Clinical Risk Index for Babies (CRIB II) score in predicting the neonatal mortality in preterm neonates < or = 32 weeks gestational age.

Design: Prospective cohort study.

Setting: Tertiary care neonatal unit.