Table 4

OR for maternal occupational particle exposure* to subgroups of organic particles, among full-time working mothers with low absence† from work during pregnancy in relation to the outcome small for gestational age (SGA)‡, low birth weight (LBW), dichotomised as <2500 g and ≥2500 g and preterm birth (PTB), dichotomised as <37 weeks and ≥37 weeks

SGALBWPTB
Adjusted§Adjusted§Adjusted§
(n=369 064)(n=369 300)(n=369 115)
OR (95% CI)No. of casesOR (95% CI)No. of casesOR (95% CI)No. of cases
Wood
 No exposure18803113 257121 233
 Exposure1.05 (0.87 to 1.28)1051.02 (0.86 to 1.20)1521.04 (0.92 to 1.19)254
Animal
 No exposure18884113 365121 403
 Exposure0.74 (0.49 to 1.11)240.87 (0.64 to 1.18)441.03 (0.83 to 1.30)84
Paper
 No exposure18804113 234121 188
 Exposure1.10 (0.89 to 1.35)1041.16 (0.99 to 1.36)1751.23 (1.08 to 1.39)299
Textile
 No exposure18782113 228121 185
 Exposure1.04 (0.87 to 1.25)1261.00 (0.86 to 1.16)1811.04 (0.92 to 1.16)302
Flour
 No exposure18895113 389121 454
 Exposure1.13 (0.64 to 1.97)131.05 (0.66 to 1.64)201.03 (0.72 to 1.48)33
Oil mist
 No exposure18809113 246121 287
 Exposure1.39 (1.13 to 1.70)991.48 (1.26 to 1.74)1631.11 (0.96 to 1.29)200
Cooking fumes
 No exposure18731113 122121 038
 Exposure1.14 (0.97 to 1.34)1771.16 (1.02 to 1.32)2871.13 (1.02 to 1.25)449
Other organic
 No exposure18725113 130120 990
 Exposure1.01 (0.86 to 1.18)1830.96 (0.85 to 1.09)2791.13 (1.02 to 1.25)497
  • *Exposure divided into unexposed and exposed.

  • †Full-time workers who stated that they were working full-time at the interview in week 10 and who had fewer than 50 days of absence from work (<50th percentile) during pregnancy (excluding the first 14 days of sickness).

  • ‡SGA, estimated by a calculated growth curve of weight and gestational age.

  • §OR adjusted for the confounders of the mother’s age, education, smoking habits, nationality, occupational exposure to noise and the children’s parity.