Gestational weight gain in Chinese women -- results from a retrospective cohort in Changsha, China

Table 2 Gestational weight gain by maternal characteristics among subjects with optimal pregnancy outcome^c in Changsha, Hunan, China, in 2016

Characteristics	N (%)	Gestational weight gain				p
Characteristics	N (%)	Mean, kg	SD	Min/Max	CV, %	p
Overall subjects	13,717 (100%)	14.3	5.31	−4.5/ 48.5	37.00
Maternal age (years)
≤ 24	3669 (25.75)	13.3^d	5.74	−4.5/ 31.8	43.27	< 0.001
25–34	8724 (63.60)	14.8^d	5.11	−4.5/ 48.5	34.58
≥ 35	1324 (9.65)	14.5^d	4.90	−3.0/ 34.0	33.87
Parity
Primiparous	9549 (69.61)	14.9	4.93	−4.5/ 48.5	32.97	< 0.001
Multiparous	4168 (30.39)	12.9	5.85	−4.5/ 31.5	45.17
Education (years)
≤ 12	8701 (64.37)	15.3	4.60	−4.5/ 32.5	21.19	< 0.001
≥ 13	5016 (36.57)	12.6	5.97	−4.5/ 48.5	47.29
Smoking during pregnancy
Yes	1461 (10.65)	15.7	4.27	−3.5/ 29.0	27.21	< 0.001
No	12,256 (89.35)	14.2	5.40	−4.5/ 48.5	38.05
IOM pre-pregnancy BMI category ^a
Underweight	2261 (16.48)	15.8^d	4.36	−4.5/ 31.5	27.54	< 0.001
Normal weight	10,114 (73.73)	14.3^d	5.19	−4.5/ 40.0	36.20
Overweight	1149 (8.38)	11.8^d	6.54	−4.5/ 48.5	55.52
Obese	193 (1.41)	13.1^d	7.01	−4.0/ 29.5	53.66
Asian pre-pregnancy BMI category ^b
Underweight	2261 (16.48)	15.8^d	4.36	−4.5/ 31.5	27.54	< 0.001
Normal weight	8273 (60.31)	14.7^d	5.04	−4.0/ 40.0	34.29
Overweight	1841 (13.42)	12.7^d	5.56	−4.5/ 32.5	43.62
Obese	1342 (9.78)	12.0^d	6.62	−4.5/ 48.5	55.35

^aIOM BMI category: underweight (BMI < 18.5), normal weight (BMI 18.5–24.9), overweight (BMI 25–29.9), obese (BMI ≥ 30)
^bAsian BMI category: underweight (BMI < 18.5), normal weight (BMI 18.5–22.9), overweight (BMI 23–24.9), obese (BMI ≥ 25)
^cOptimal outcome was defined as woman who has no prenatal medical complications (such as GDM or PIH), giving live birth at a gestational age between37 and 42 weeks, and infant birth weight between 2500 and 3999 g
^dSNK test showed significant differences between each other, p < 0.05

ISSN: 1471-2393