Table 4.

The frequencies of childhood proteinuria at 3 years of age according to maternal smoking during pregnancy and household smoking after birth of the child

NumbersMaternal Smoking Status during Pregnancy
Current, n=7460Past, n=1957None, n=35,178Total, n=44,595
All children with childhood proteinuria, n (%)125 (1.7)31 (1.6)452 (1.3)608 (1.4)
Household smoking after the child’s birth
 Exposedn=6340n=1897n=19,060n=27,297
  Childhood proteinuria, n (%)104 (1.6)30 (1.6)272 (1.4)406 (1.5)
 Not exposedn=1120n=60n=16,118n=17,298
  Childhood proteinuria, n (%)21 (1.9)1 (1.7)180 (1.1)202 (1.2)