Table 1 Study characteristics by sex of the child

Maternal age

34.5

4.5

34.4

4.5

34.6

4.5

0.84

Gestational age at delivery (weeks)

39.3

1.7

39.3

1.8

39.3

1.5

0.96

Interpregnancy interval (days)

1671

968

1737

880

1617

1038

0.47

Total number of pregnancies

3.7

1.6

3.5

1.4

3.9

1.7

0.16

Androgen levels

 ln(u-T)

-1.2

2.1

-1.7

2.0

-0.8

2.1

0.0083

 ln(t-T)

3.1

1.6

2.8

1.6

3.4

1.5

0.018

 ln(u-A4)

2.9

0.6

2.9

0.6

2.8

0.5

0.30

 ln(t-A4)

5.3

0.6

5.4

0.7

5.2

0.5

0.17

 ln(u-DHEA)

2.4

0.8

2.5

0.8

2.3

0.7

0.051

 ln(t-DHEA)

7.2

1.3

7.2

1.4

7.2

1.3

0.71

Outcome scores

 Total AOSI score^a

5.2

2.1

4.9

1.9

5.4

2.2

0.46

 Total SRS score^a

28.4

2.0

22.4

1.7

34.4

2.0

< 0.0001

Total AOSI score

5.5 (5)

4.1 (3–8)

4.8 (4)

3.1 (3–7)

6.0 (5)

4.8 (2.5–8.5)

0.33^b

Total SRS score

35.7 (28)

25.8 (18–42)

25.6 (22)

13.2 (16–33)

43.8 (35)

30.2 (21–65)

< 0.001^b

Cesarean delivery

 Yes

35.3

48

38.3

23

32.9

25

0.51

Maternal race

 White

66.9

89

61.0

36

71.6

53

0.50

 Black

9.8

13

13.6

8

6.8

5

 Asian

12.0

16

13.6

8

10.8

8

 Other

11.3

15

11.9

7

10.8

8

Maternal ethnicity

 Hispanic

17.5

24

16.4

10

18.4

14

0.76

Maternal education

 < 9th

3.7

5

4.9

3

2.7

2

0.94

 High school graduate

25.9

35

26.2

16

25.7

19

 College

40.7

55

39.3

24

41.9

31

 Graduate/professional degree

29.6

40

29.5

18

29.7

22

Income

 < $29,999

8.4

11

6.9

4

9.6

7

0.03

 $30,000–49,999

16.8

22

25.9

15

9.6

7

 $50,000–74,999

15.3

20

15.5

9

15.1

11

 $75,999–99,999

16.0

21

6.9

4

23.3

17

 $100,000+

43.5

57

44.8

26

42.5

31

Sex of the proband

 Female

16.8

23

16.4

10

17.1

13

0.91

 Male

83.2

114

83.6

51

82.9

63