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. Author manuscript; available in PMC: 2024 Nov 1.
Published in final edited form as: Environ Res. 2023 Jul 28;236(Pt 2):116772. doi: 10.1016/j.envres.2023.116772

Table 2:

Mean and incidence of perinatal outcomes among ECHO-wide Cohort Study participants, by exposure status.

N Birth weight
mean (SD)		 Gestational age
mean (SD)		 Preterm birth
n (%)		 SGA
n (%)		 LGA
n (%)
Overall 15,342 3,265.24 (683.87) 38.42 (2.79) 1,684 (10.98%) 947 (6.17%) 2,555 (16.65%)
 Exposed 794 3,197.50 (791.72) 37.93 (3.50) 119 (14.99%) 42 (5.29%) 146 (18.39%)
  1-3 Windows 303 3,054.05 (991.39) 37.15 (4.73) 60 (19.80%) 18 (5.94%) 60 (19.80%)
  4 Windows 491 3,286.02 (622.97) 38.41 (2.33) 59 (12.02%) 24 (4.89%) 86 (17.52%)
 Unexposed 14,548 3,268.94 (677.33) 38.45 (2.74) 1,565 (10.76%) 905 (6.22%) 2,409 (16.56%)

Abbreviations: SGA: small for gestational age; LGA: large for gestational age; SD: standard deviation.