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Table 4 Crude and adjusted odds of birth of a male infant among women occupationally PCB-exposed and unexposed women prior to conception, stratified by plant

From: Maternal exposure to polychlorinated biphenyls and the secondary sex ratio: an occupational cohort study

Estimated Cumulative PCB exposure a,
at estimated date of conception
Women
(n)
Crude
OR (95% CI)
Adjustedb
OR (95% CI)
Indiana Plant (n = 173)    
  No exposure 87 1.00 (ref) 1.00 (ref)
  > 0 to <2,460 21 0.98 (0.37, 2.55) 1.19 (0.43, 3.28)
  2,460 to <4,867.5 22 1.07 (0.42, 2.74) 1.20 (0.42, 3.39)
  4,867.5 to <8,510 21 0.36 (0.13, 1.01) 0.39 (0.12, 1.25)
  8,510+ 22 0.74 (0.29, 1.90) 0.81 (0.27, 2.42)
Massachusetts Plant (n = 1481)    
  No exposure 447 1.00 (ref) 1.00 (ref)
  > 0 to <84,672 258 1.06 (0.78, 1.44) 1.06 (0.77, 1.47)
  84,672 to <193,320 258 1.08 (0.79, 1.47) 1.09 (0.78, 1.52)
  193,320 to <397,512 259 0.90 (0.67, 1.23) 0.93 (0.67, 1.29)
  397,512+ 259 1.16 (0.85, 1.57) 1.16 (0.84, 1.61)
New York Plant (n = 941)    
  No exposure 555 1.00 (ref) 1.00 (ref)
  > 0 to <8,700 96 0.85 (0.55, 1.32) 0.85 (0.54, 1.34)
  8,700 to <20,988 97 1.07 (0.70, 1.65) 1.08 (0.69, 1.71)
  20,988 to <54,120 96 1.14 (0.74, 1.77) 1.07 (0.66, 1.73)
  54,120+ 97 1.22 (0.79, 1.88) 1.20 (0.74, 1.96)
  1. a Cumulative exposure was estimated using the combined inhalation-dermal job exposure matrix
  2. b Adjusted for the mother's date of birth and maternal age at the birth of her first live-born child