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Table 1 Characteristics of 61,800 women, with a singleton pregnancy, giving birth from 28 weeks’ gestation, divided into Body Mass Index groups

From: Prolonged pregnancy and stillbirth among women with overweight or obesity – a population-based study in Sweden including 64,632 women

 

BMI < 18.5 (underweight) n = 1729

n (%)

BMI 18.5–24.9 (normal weight) n = 39,000

n (%)

BMI 25.0–29.9 (overweight) n = 14,526

n (%)

BMI 30.0–34.9 (obesity) n = 4855

n (%)

BMI ≥ 35∫ (severe obesity) n = 1690

n (%)

Country of origin

Sweden

1018 (58.9)

27 441 (70.4)

8781 (60.5)

2790 (57.5)

1034 (61.2)

Europe

183 (10.6)

3661 (9.4)

1194 (8.2)

350 (7.2)

117 (6.9)

Asia

351 (20.3)

5502 (14.1)

2800 (19.3)

991 (20.4)

263 (15.6)

Africa

147 (8.5)

1518b (3.9)

1256 (8.6)

550 (11.3)

212 (12.5)

South America

15 (0.9)

572 (1.5)

380 (2.6)

141 (2.9)

50 (3.0)

North America

9 (0.5)

217 (0.6)

70 (0.5)

22 (0.5)

8 (0.5)

Other

6 (0.3)

87 (0.2)

45 (0.3)

11 (0.2)

6 (0.4)

Missing

0

2

0

0

0

Age

 ≤ 24

235 (13.6)

2621 (6.7)

1048 (7.2)

407 (8.4)

158 (9.3)

25–34

1143 (66.1)

25 368 (65.0)

9064 (62.4)

2949 (60.7)

1030 (60.9)

 ≥ 35

351 (20.3)

11 011 (28.2)

4414 (30.4)

1499 (30.9)

502 (29.7)

Education levela

Shorter than 9 years

33 (1.9)

337 (0.9)

335 (2.3)

165 (3.4)

79 (4.7)

Elementary school

108 (6.2)

1338 (3.4)

850 (5.9)

373 (7.7)

144 (8.5)

High school

438 (25.3)

8627 (22.1)

4541 (31.3)

1797 (37.0)

707 (41.8)

University

1004 (58.1)

25 678 (65.8)

7473 (51.4)

1993 (41.1)

584 (34.6)

Occupationb

Employed

1207 (69.8)

31 157 (79.9)

10 306 (70.9)

3152 (64.9)

1082 (64.0)

Unemployed

51 (2.9)

906 (2.3)

497 (3.4)

205 (4.2)

78 (4.6)

Studying

213 (12.3)

2894 (7.4)

1366 (9.4)

501 (10.3)

154 (9.1)

Parental leave

94 (5.4)

2101 (5.4)

1162 (8.0)

489 (10.1)

192 (11.4)

Sick leave

27 (1.6)

417 (1.1)

242 (1.7)

103 (2.1)

46 (2.7)

Other

121 (7.0)

1308 (3.4)

830 (5.7)

347 (7.1)

120 (7.1)

Parity

Primipara

899 (52.0)

18 302 (46.9)

5771 (39.7)

1721 (35.4)

566 (33.5)

Multipara

830 (48.0)

20 698 (53.1)

8755 (60.3)

3134 (64.6)

1124 (66.5)

Previous stillbirth

6 (0.7)

146 (0.7)

114 (1.3)

62 (2.0)

23 (2.0)

Tobacco user at registration

59 (3.4)

860 (2.2)

500 (3.4)

248 (5.1)

103 (6.1)

Assisted reproduction

81 (4.7)

2266 (5.8)

748 (5.1)

268 (5.5)

42 (2.5)

Intercurrent diseases

Diabetes mellitus

1 (0.1)

38 (0.1)

27 (0.2)

19 (0.4)

12 (0.7)

Coronary heart disease

35 (2.0)

528 (1.4)

238 (1.6)

76 (1.6)

42 (2.5)

Thrombosis

11 (0.6)

269 (0.7)

125 (0.9)

39 (0.8)

17 (1.0)

Psychiatric care

174 (10.1)

4638 (11.9)

1888 (13.0)

655 (13.5)

281 (16.6)

Endocrine disease

82 (4.7)

2418 (6.2)

1061 (7.3)

455 (9.4)

185 (10.9)

Chronic hypertension

4 (0.2)

114 (0.3)

83 (0.6)

57 (1.2)

30 (1.8)

Medication or psychological treatment for mental illness

74 (4.3)

1945 (5.0)

899 (6.2)

343 (7.1)

101 (6.0)

  1. aMissing underweight: 146 (8.4%), normal weight 3020 (7.7%), overweight 1327 (9.1%), obese 527 (10.9%), severe obese 176 (10.4%)
  2. bMissing underweight: 16 (0.9%), normal weight 217 (0.6%), overweight 123 (0.8%), obese 58 (1.2%), severe obese 18 (1.1%)