Table 1.

Sample characteristics

Demographic	Children with NE	Control children
Mother's age, y	36.8 ± 5.8	37.3 ± 4.3
Father's age, y	40.3 ± 6.0	40.0 ± 5.5
Mother's education, y	14.1 ± 2.3	14.7 ± 2.5
Father's education, y	15.4 ± 3.6	14.2 ± 2.3
Number of residents at home	4.3 ± 1.2	4.6 ± 0.8
Number of rooms at home	4.5 ± 0.9	4.8 ± 1.3
Number of children in familya	2.3 ± 0.8	2.7 ± 0.8
First or only child	44.8	30.9
Two-parent family	86.2	94.6

Data are displayed as mean ± SD or %.

NE refers to nocturnal enuresis.

^aSignificant group difference, P < 0.05