Associations between family characteristics and ALL in Swiss children aged 0 to 14 years, unadjusted.

acontrols were individually matched to cases on sex and age.busing a univariable conditional logistic regression model.cp values for trend were obtained from a conditional logistic regression including the variable continuously, for number of older siblings, the coding was 0, 1, 2, for socio-economic status, the coding was 1, 2, 3.dsocio-economic status was defined as the highest education attained by either the father or the mother.