Table 2 Frequency (n, %) of adverse pregnancy outcomes in different GWG sublayers in the normal weight group

 < 2

14 (0.7)

0 (0)

2 (14.3)

0 (0)

5 (35.7)

0 (0)

7 (50.0)

2 (14.3)

2 (14.3)

1 (7.1)

0 (0)

 ≥ 2–4

10 (0.5)

1 (10.0)

1 (10.0)

1 (10.0)

1 (10.0)

2 (20.0)

3 (30.0)

0 (0)

0 (0)

0 (0)

0 (0)

 ≥ 4–6

38 (1.8)

5 (13.2)

1 (2.6)

0 (0)

4 (10.5)

3 (7.9)

12 (31.6)

4 (10.5)

5 (13.2)

10 (26.3)

0 (0)

 ≥ 6–8

55 (2.7)

4 (7.3)

4 (7.3)

1 (1.8)

7 (12.7)

3 (5.5)

25 (45.5)

10 (18.2)

3 (5.5)

6 (10.9)

1 (1.8)

 ≥ 8–10

123 (6.0)

7 (5.7)

6 (4.9)

6 (4.9)

4 (3.3)

8 (6.5)

51 (41.5)

18 (14.6)

19 (15.4)

25 (20.3)

2 (1.6)

 ≥ 10–12

316 (15.3)

25 (7.9)

17 (5.4)

11 (3.5)

23 (7.3)

18 (5.7)

101 (31.9)

48 (15.1)

48 (15.1)

44 (13.9)

6 (1.9)

 ≥ 12–14

328 (15.9)

12 (3.7)

12 (3.7)

15 (4.6)

25 (7.6)

26 (7.9)

120 (36.6)

46 (14.0)

41 (12.5)

30 (9.1)

6 (1.8)

 ≥ 14–16

424 (20.6)

20 (4.7)

15 (3.5)

24 (5.7)

23 (5.4)

32 (7.5)

188 (44.3)

63 (14.9)

43 (10.1)

37 (8.7)

7 (1.7)

 ≥ 16–18

240 (11.7)

4 (1.7)

5 (2.1)

14 (5.8)

16 (6.7)

22 (9.2)

90 (37.5)

44 (18.3)

26 (10.8)

19 (7.9)

6 (2.5)

 ≥ 18–20

191 (9.3)

4 (2.1)

6 (3.1)

10 (5.2)

9 (4.7)

17 (8.9)

75 (39.3)

14 (7.3)

15 (7.9)

21 (11.0)

5 (2.6)

 ≥ 20–22

163 (7.9)

3 (1.8)

3 (1.8)

13 (7.9)

7 (4.3)

23 (14.0)

77 (47.0)

25 (15.2)

31 (18.9)

11 (6.7)

4 (2.4)

 ≥ 22–24

68 (3.3)

2 (2.9)

1 (1.4)

10 (14.5)

1 (1.4)

14 (20.3)

40 (58.0)

9 (13.0)

6 (8.7)

4 (5.8)

2 (2.9)

 ≥ 24–26

49 (2.4)

1 (2.0)

0 (0)

8 (16.3)

0 (0)

10 (20.4)

23 (46.9)

10 (20.4)

5 (10.2)

1 (2.0)

2 (4.1)

 ≥ 26–28

19 (0.9)

0 (0)

0 (0)

1 (5.3)

1 (5.3)

1 (5.3)

7 (36.8)

1 (5.3)

4 (21.1)

4 (21.1)

0 (0)

 ≥ 28

21 (1.0)

0 (0)

1 (4.8)

2 (9.5)

2 (9.5)

2 (9.5)

14 (66.7)

2 (9.5)

2 (9.5)

1 (4.8)

1 (4.8)

Total

2062

88 (4.3)

74 (3.6)

116 (5.6)

128 (6.2)

181 (8.8)

833 (40.4)

296 (14.4)

250 (12.1)

214 (10.4)

42 (2.0)