Table 1 The characteristics of included population.

From: Development and validation of a prediction model on severe maternal outcomes among pregnant women with pre-eclampsia: a 10-year cohort study

Characteristics

Median (interquartile range)/number (percentage)

Maternal age (year)

31 (27–35)

Pre-pregnancy BMI (kg/m2)

22.30 (20.03–24.97)

Rural residents

1208 (43.9)

Gestational week

36 (33–38)

Systolic pressure at admission (mmHg)

147 (134–163)

Diastolic pressure at admission (mmHg)

94 (85–105)

Number of gravities

2 (1–4)

Multipara

1031 (36.91)

Use of ART

182 (6.53)

Multiple gestations

386 (13.88)

Placenta previa

121 (4.33)

Oligohydramnios

148 (5.30)

History of cesarean section

404 (14.49)

History of gestational hypertension

98 (3.51)

History of stillbirth

71 (2.54)

Intrahepatic cholestasis

429 (15.36)

Hypertension

209 (7.48)

Diabetes mellitus

126 (4.51)

Gestational diabetes mellitus

424 (15.18)

HBsAg positivity

191 (6.84)

Cardiac diseases

73 (2.61)

IDA

295 (10.56)

Thalassemia

12 (0.43)

Neurological and mental diseases

17 (0.61)

Chronic nephritis

57 (2.04)

Other urinary system diseases

16 (0.57)

Immune system diseases

48 (1.72)

Hyperthyroidism

35 (1.25)

Hypothyroidism

88 (3.15)

Fatty liver

16 (0.57)

Hypoproteinemia

155 (5.55)

  1. BMI body mass index, ART assisted reproductive technology, HBsAg hepatitis B virus surface antigen, IDA iron deficiency anemia.