Percentage distribution by weight group of newborns of mothers with both no prenatal care (NPC) and nuclear family dysfunction (FD) compared with newborns of mothers with only 1 or neither of these factors. By the Kolmogorov-Smirnov 2-sample test, the birth weight distribution of the NPC and FD groups was significantly lower than that of the other 3 groups (P<.001). There was no significant difference in birth weight distribution among the other 3 groups by the Kolmogorov-Smirnov 2-sample test. The random sample excluded NPC cases and controls.
