A Population-Based Study on Gestational Weight Gain according to Body Mass Index in the Southeast of Brazil

Table 3

Pregnancy outcomes according to BMI category of women in southeast of Brazil.

Gestational outcomes	Total sample	BMI < 18.5	BMI ≥ 18.5 < 25	BMI ≥ 25 < 30	BMI ≥ 30	𝑃 value
Final weight (kg)—mean ± SD	77.39±14.13	60.19±6.40	71.46±8.21	83.12±9.61	99.54±13.8344	<0.0001**
C-section rate—𝑛 (%)	619 (58.9)	31 (49.21)	318 (55.99)	159 (63.35)	101 (72.66)	<0.0001*
Gestational age at birth—weeks—mean ± SD	38.10±1.38	38.54±1.59	38.76±1.47	38.85±1.42	38.43±1.81	0.1183**
Prematurity rate <37 weeks—𝑛 (%)	58 (5.9)	4 (6.67)	30 (5.55)	9 (3.70)	10 (8.20)	0.0498*
Newborn weight (g)—mean ± SD	3298.12±454.96	3071.87±414.99	3217.57±441.86	3303.10±442.00	3306.66±539.03	0.0003**
Newborn weight (g)—𝑛 (%)
<2500	59 (5.8)	6 (9.68)	34 (6.10)	9 (3.70)	9 (6.98)	<0.0001*
2500–3999	923 (90.7)	56 (90.32)	507 (91.02)	223 (91.77)	111 (86.05)
≥4000	36 (3.5)	—	16 (2.87)	11 (4.53)	9 (6.98)

∗Chi-square; **Kruskal-Wallis; SD: standard deviation; BMI: body mass index.