Table 5 Odds ratios (ORs) of socioeconomic status (SES) for SGA after adjustments for maternal and pregnancy characteristics and other significant risk factors for SGA

Upper white-collar

1

1

1

1

1

1

1

Lower white-collar

1.16 (1.11 − 1.21)

1.24 (1.18 − 1.29)

1.14 (1.09 − 1.20)

41.7

1.14 (1.09 − 1.19)

-

1.14 (1.09 − 1.20)

-

1.14 (1.09 − 1.19)

-

1.14 (1.09 − 1.19)

-

Blue-collar

1.42 (1.35 − 1.48)

1.57 (1.49 − 1.64)

1.28(1.21 − 1.34)

50.9

1.28 (1.22 − 1.35)

-

1.27 (1.21 − 1.34)

3.6

1.27 (1.21 − 1.34)

3.6

1.27 (1.21 − 1.33)

3.6

Other

1.19 (1.14 − 1.25)

1.28 (1.22 − 1.34)

1.19 (1.14 − 1.25)

32.1

1.18 (1.13 − 1.24)

5.3

1.18 (1.13 − 1.24)

5.3

1.19 (1.13 − 1.25)

-

1.18 (1.12 − 1.24)

5.3

Missing

1.36 (1.19 − 1.30)

1.39 (1.32 − 1.46)

1.24 (1.18 − 1.31)

38.5

1.25 (1.19 − 1.32)

-

1.23 (1.17 − 1.29)

4.2

1.24 (1.18 − 1.30)

-

1.22 (1.16 − 1.29)

8.3