. 2023 Aug 28;35:102391. doi: 10.1016/j.pmedr.2023.102391

Table 2.

Association between pre-pregnancy body mass index and stillbirth in the Japan Environment and Children’s Study; Japan, 2011–2014.

Pre-pregnancy BMI	Crude OR (95% CI)	Adjusted OR (95% CI)
<18.5 kg/m²	0.77 (0.54–1.10)	0.71 (0.49–1.04)
18.5–<25.0 kg/m²	1.00	1.00
25.0–<30.0 kg/m²	1.59 (1.13–2.25)	1.55 (1.08–2.23)
≥30.0 kg/m²	2.43 (1.50–3.95)	2.60 (1.59–4.24)

*Regression analysis was performed after adjusting for pre-pregnancy BMI, maternal age at delivery, parity, parental smoking status, exposure to secondhand smoking, ART, infant sex, infants born of multiple birth, HT, DM, and thyroid disease.

ART, assisted reproductive technology; BMI, body mass index; CI, confidence interval; DM, diabetes mellitus; HT, hypertension; OR, odds ratio.