Table II.

Associations between occupational exposure to chemicals and placental weight among pregnant women participating in a birth cohort study.

Occupational chemical exposure	Placental weight (g)
	Crudea	Adjustedb
Exposure to
PAH	−21.21 (−65.17 to 22.75)	−7.64 (−52.03 to 36.76)
Pesticides	−74.84 (−138.34 to −11.35)*	−65.90 (−129.86 to −1.94)*
Phthalates	−59.55 (−98.11 to −21.00)*	−45.88 (−85.15 to −6.60)*
Organic solvents	−17.74 (−39.21 to 3.74)	−10.00 (−32.36 to 12.36)
Alkylphenolic compounds	−15.81 (−41.01 to 9.39)	−5.43 (−32.03 to 21.16)
Metals	−37.14 (−80.53 to 6.26)	−35.22 (−78.54 to 8.09)
Any chemicals	−18.71 (−37.20 to −0.22)*	−11.03 (−30.28 to 8.23)

Results from simple and multiple linear regression analysis. Values are regression coefficients (95% CIs) and reflect the difference in grams for placental weight between women exposed to chemicals in the workplace compared with non-exposed women. Based on 3185 measurements of placental weight.

^aAdjusted for gestational age at birth.

^bAdjusted for gestational age at birth, maternal age, educational level, ethnicity, fetal gender, weight before pregnancy, height at intake, smoking during pregnancy, alcohol use during pregnancy, folic acid use, parity, long periods of standing, handling loads of >5 kg, handling loads of >25 kg, night shifts, pre-eclampsia, pregnancy-induced hypertension and diabetes gravidarum.

*P< 0.05.