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Table 1 Selected characteristics in relation to group (symptom-free (SF), nausea only (NP), and nausea and vomiting (NVP)), including total sample used and those excludeda

From: Pregnancy complications and birth outcomes among women experiencing nausea only or nausea and vomiting during pregnancy in the Norwegian Mother and Child Cohort Study

 

SF

NP

NVP

Total sample

Excludedb

(n = 14 234)

(n = 20 371)

(n = 17 070)

(n = 51 675)

(n = 41 195)

Maternal age at delivery (y), n = 51 675

Mean (SD)

Mean (SD)

Mean (SD)

Mean (SD)

Mean (SD)

30.3 (4.5)

30.8 (4.4)

29.2 (4.6)

30.1 (4.6) (missing = 0 %)

29.8 (4.8) (missing = 1 %)

BMI at pregnancy start (kg/m2), n = 51 675

23.9 (4.1)

23.9 (4.1)

24.3 (4.6)

24.0 (4.3) (missing = 0 %)

24.4 (4.4) (missing = 16.9 %)

Energy intake (kJ), n = 51 675

9539 (2527.8)

9706.2 (2489.0)

9830.7 (2722.1)

9701.5 (2581.2) (missing = 0 %)

9644.5 (4170.1) (missing = 20.8 %)

 

n (%)

n (%)

n (%)

n (%)

n (%)

Parity, n = 51 648 Para 0

8947 (62.9)

9475 (46.5)

9070 (53.2)

27 492 (49.8) (missing = 0.1 %)

20 513 (53.2) (missing = 0.7 %)

Maternal education (y), n = 51 675 ≤ 12 y

4200 (30.2)

5535 (27.7)

5755 (34.5)

15 490 (30.0) (missing = 2.1 %)

13 402 (32.5) (missing = 13.2 %)

Smoking during pregnancy, n = 51 329 Daily

946 (6.7)

805 (4.0)

803 (4.7)

2554 (4.9) (missing = 0.7 %)

2629 (6.4) (missing = 14.4 %)

  1. aExcerpt of sample characteristics from Chortatos et al. [10]
  2. bTotal MoBa sample n = 108 842 children, minus 1906 2nd or 3rd order children from multiple pregnancies = 106 936 women. Minus 51 675 women included in sample = 55 261. Excluding 14 066 women with ≥1 participation in MoBa gives 41 195 unique cases