net differentials are based on adjusted estimates of the underfive mortality rate where the adjustment consists of applying statistical controls for other factors potentially contributing to the gross differentials separately from household wealth in addition to household wealth variables such as age of mother at the birth of the child length of the mother s previous birth interval birth order and sex of the child were used as statistical controls the results suggest that household wealth may have substantial effects on child survival at the global level in general the probability of child survival tends to be higher at higher levels of household wealth