Table 2 Crude and adjusted odds ratios for outcomes associated with paternal age, maternal age and fetal sex (total live births = 1,347,672)

  < 25

0.98 (0.92, 1.04)

1.00 (0.94, 1.07)

1.45 (1.09, 1.94)+

1.37 (1.01, 1.85)+

1.14 (1.11, 1.18)+

1.05 (1.01, 1.09)+

25–29 (ref)

1.00

1.00

1.00

1.00

1.00

1.00

30–34

1.05 (1.02, 1.09)+

1.01 (0.98, 1.05)

1.18 (0.99, 1.41)

1.18 (0.97, 1.43)

1.02 (1.00, 1.04)+

1.03 (1.01, 1.05)+

35–39

1.24 (1.20, 1.28)+

1.08 (1.04, 1.13)+

1.17 (0.96, 1.42)

1.10 (0.86, 1.41)

1.14 (1.12, 1.16)+

1.09 (1.06, 1.12)+

40–44

1.58 (1.51, 1.65)+

1.26 (1.19, 1.33)+

1.85 (1.45, 2.36)+

1.59 (1.17, 2.16)+

1.33 (1.30, 1.37)+

1.19 (1.15, 1.23)+

45–49

1.73 (1.60, 1.87)+

1.42 (1.31, 1.55)+

1.81 (1.17, 2.79)+

1.53 (0.94, 2.49)

1.39 (1.33, 1.46)+

1.25 (1.18, 1.32)+

  ≥ 50

1.67 (1.46, 1.90)+

1.60 (1.39, 1.84)+

2.25 (1.16, 4.39)+

2.14 (1.05, 4.38)+

1.44 (1.32, 1.57)+

1.38 (1.27, 1.51)+

  < 20

0.93 (0.85, 1.03)

0.89 (0.80, 0.99)+

1.31 (0.81, 2.11)

1.06 (0.65, 1.74)

1.35 (1.29, 1.42)+

1.25 (1.19, 1.32)+

20–24

0.89 (0.86, 0.93)+

0.89 (0.86, 0.94)+

1.07 (0.86, 1.32)

1.00 (0.79, 1.26)

1.02 (1.00, 1.04)

1.00 (0.97, 1.02)

25–29 (ref)

1.00

1.00

1.00

1.00

1.00

1.00

30–34

1.18 (1.15, 1.21)+

1.19 (1.15, 1.23)+

1.21 (1.03, 1.41)+

1.22 (1.02, 1.45)+

1.09 (1.07, 1.11)+

1.10 (1.08, 1.12)+

35–39

1.69 (1.63, 1.75)+

1.60 (1.53, 1.67)+

1.54 (1.26, 1.88)+

1.48 (1.14, 1.91)+

1.39 (1.36, 1.42)+

1.34 (1.30, 1.37)+

  ≥ 40

2.76 (2.58, 2.94)+

2.31 (2.14, 2.49)+

3.07 (2.18, 4.31)+

2.44 (1.64, 3.63)+

1.91 (1.82, 1.99)+

1.70 (1.62, 1.79)+

Boy vs Girl

0.95 (0.93, 0.97)+

0.95 (0.93, 0.97)+

0.80 (0.71, 0.91)+

0.80 (0.71, 0.91)+

1.24 (1.22, 1.25)+

1.24 (1.22, 1.25)+