Journal of Clinical Medicine Research, ISSN 1918-3003 print, 1918-3011 online, Open Access
Article copyright, the authors; Journal compilation copyright, J Clin Med Res and Elmer Press Inc
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Letter to the Editor

Volume 9, Number 2, February 2017, pages 180-181

Optimal Pre-Pregnancy Body Mass Index Cut-Offs for Obesity in Japan

Table

Table 1. Clinical Description and Perinatal Outcomes in Japanese Singleton Pregnancies Delivered at ≥ 22 Weeks’ Gestation Based on the Maternal Pre-Pregnancy BMI Cut-Offs for Obesity According to the JMHLW, the WHO Asian and the IOM BMI Guidelines
 
Pre-pregnancy BMIControlObesity of JMHLWObesity of WHOObesity of IOM
Data are expressed as mean ± standard deviation or number (percentages). *P < 0.01 vs. control. BMI: body mass index; JMHLW: Japanese Ministry of Health, Labour and Welfare; WHO: World Health Organization; IOM: the Institute of Medicine.
BMI18.5 - 24.925.0 - 27.427.5 - 29.9≥ 30.0
Number3,785225151110
Average21.1 ± 1.526.4 ± 0.628.7 ± 0.833.0 ± 2.4
Maternal height (cm)159 ± 5.3157 ± 5.9158 ± 5.0158 ± 6.6
Body weight at pre-pregnancy (kg)52.9 ± 5.165.3 ± 5.2*72.5 ± 5.0*82.5 ± 8.5*
Body weight at delivery (kg)63.5 ± 6.5756 ± 7.7*80.8 ± 7.1*87.6 ± 9.2*
Gestational weight gain (kg)10.3 ± 5.710.3 ± 4.77.1 ± 5.65.0 ± 5.0*
Maternal age (years)32.7 ± 5.632.7 ± 6.032.7 ± 6.031.9 ± 5.0
  < 20 years80 (2.1%)4 (1.2%)2 (1.3%)0 (0%)
  ≥ 35 years1,338 (35.3%)75 (23.1%)57 (31.7%)29 (26.4%)
Nulliparity1,838 (48.0%)96 (43.7%)61 (40.4%)57 (51.8%)
Hypertensive disorders310 (8.2%)25 (11.1%)23 (15.2%)*25 (22.7%)*
Impaired glucose tolerance82 (2.2%)12 (5.3%)*11 (7.3%)*17 (15.5%)*
Preterm delivery249 (8.6%)14 (6.2%)8 (5.3%)6 (6.5%)
Cesarean delivery538 (14.2%)35 (15.6%)18 (11.9%)36 (32.7%)*
Neonatal birth weight (g)2,990 ± 4413,081 ± 4463,148 ± 411*3,246 ± 399*
  < 2,500g399 (10.5%)18 (8.0%)6 (4.0%)*2 (1.3%)*
  ≥ 4,000g28 (0.7%)4 (1.8%)6 (4.0%)*5 (6.5%)*
Postpartum hemorrhage ≥ 1,000 mL356 (9.4%)28 (12.4%)21 (13.9%)15 (9.9%)