Table 1 Characteristics of cases with cryptorchidism and their matched controls

Number of cases (N)

51

306

NS

Birth weight (kg)

3.31 ± 0.48

3.34 ± 0.46

NS

Birth term (weeks)

39.5 ± 1.2

39.5 ± 1.3

NS

Maternal age (years)

29.9 ± 4.4

29.5 ± 4.6

NS

Gestational age at time of screening (weeks)

13.6 ± 1.0

13.6 ± 1.0

NS

hCG (KU/L)^a

21.4 (12.3; 37)

27.7 (15.9; 47.9)

< 0.01

MoM hCG^a

0.8 (0.5; 1.2)

1.0 (0.6; 1.6)

< 0.01

AFP (KU/L)^a

28.0 (18.6; 42.6)

28.8 (20.5; 40.5)

NS

MoM AFP^a

0.9 (0.7; 1.4)

0.9 (0.7; 1.3)

NS