Table 2 Characteristics for 746 women hospitalized due to hyperemesis gravidarum at Haukeland university Hospital during 2002–2016, comparing women with inadequate and adequate weight gain during pregnancy according to BMI-category^a

Age at admission (years)

28.0

28.0–29.0

28.0

27.0–29.0

0.931

Weight loss at admission ^d (kg)

5.0

4.0–5.0

4.0

3.0–4.0

< 0.001

Weight loss at admission^e (%)

7.3

6.7–7.5

5.4

5.0–5.8

< 0.001

Gestational age at admission^f (weeks)

9.0

8.4–9.3

8.6

8.4–9.1

0.379

Body mass index (kg/m²)

23.6

23.1–23.9

23.9

23.2–24.7

0.433

Number

%

Number

%

P-value

Chi-Square test

Parity

0.720

 Nulliparous

136

39.7

165

40.9

 Multiparous

207

60.3

238

59.1

Hyperemesis in previous pregnancy^g

0.422

 HG previously

105

47.5

110

43.8

 No HG previously

116

52.5

141

56.2

Prepregnancy weight regained at 12–15 or 16–18 weeks^h

< 0.001

 Not regained

127

71.8

53

26.1

 Regained

50

28.2

150

73.9

SGA (n = 708)

< 0.001

 SGAⁱ

54

16.7

16

4.2

 Not SGA

270

83.3

368

95.8

LGA (n = 708)

< 0.001

 LGA^j

11

3.4

39

10.2

 Not LGA

313

96.6

345

89.8