The Association of Prepregnancy Body Mass Index with Pregnancy Outcomes in Chinese Women
Table 1
Baseline characteristics of the study participants.
Characteristics
Total ()
Prepregnancy BMI
Underweight ()
Normal ()
Overweight ()
Obese ()
Age, years ()
<0.001
History of pregnancy, (%)
0.240
Nulliparous
125 (8.09)
17 (11.04)
83 (7.91)
14 (5.88)
11 (10.48)
Yes
1421 (91.91)
137 (88.96)
966 (92.09)
224 (94.12)
94 (89.52)
Conception method, (%)
<0.001
ART
130 (8.46)
7 (4.61)
72 (6.90)
32 (13.50)
19 (18.27)
Spontaneous pregnancy
1407 (91.54)
145 (95.39)
972 (93.10)
205 (86.50)
85 (81.73)
Number of pregnancies, (%)
0.291
Single
1499 (97.27)
152 (99.35)
1016 (97.13)
229 (96.22)
102 (98.08)
Multiple
42 (2.73)
1 (0.65)
30 (2.87)
9 (3.78)
2 (1.92)
Note: prepregnancy BMI groups were defined , normal 18.5-23.9 kg/m2, overweight 24-27.9 kg/m2, and . values represent the significance in the difference of the variable distribution among underweight, normal, overweight, and obese groups, with as statistically significant difference. Abbreviations: SD: standard deviation; ART: assisted reproductive technology.
