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. 2020 Feb 24;97(2):271–278. doi: 10.1007/s11524-020-00426-w

Table 1.

Demographic and psychosocial factors of the Life-course Influences on Fetal Environments study participants (2009–2011)

Total sample (n = 681)
N (%)
Term delivery (n = 570)
N (%)
Preterm (n = 111)
N (%)
RR 95% CI
Age
  18–19 56 (8.22) 45 (7.89) 11 (9.91) 1.26 0.68, 2.36
  20–24 206 (30.25) 171 (30.00) 35 (31.53) 1.09 0.70, 1.71
  25–29 193 (28.34) 163 (28.60) 30 (27.03) Referent
  30–34 128 (18.80) 110 (19.30) 18 (16.22) 0.90 0.53, 1.55
  35+ 98 (14.39) 81 (14.21) 17 (15.32) 1.10 0.64, 1.90
Married
  No 490 (72.8) 409 (72.65) 81 (73.64) Referent
  Yes 183 (27.19) 154 (27.35) 29 (26.36) 0.96 0.65, 1.41
Education (years)
  ≤ 12 183 (26.87) 155 (27.19) 28 (25.23) Referent
  > 12 498 (73.13) 415 (72.81) 83 (74.77) 1.09 0.74, 1.61
Income
  Under $35,000 299 (47.31) 254 (48.02) 45 (43.69) 1.16 0.81, 1.65
  $35,000 or more 333 (52.69) 275 (51.98) 58 (56.31) Referent
Depressive symptoms (median split)
  < 9 300 (47.39) 253 (47.56) 47 (46.53) Referent
  ≥ 9 333 (52.61) 279 (52.44) 54 (53.47) 1.04 0.72, 1.48