Table 2.

Percent Attrition in Cohort Analyzed by Maternal and Child Characteristics at FCV and After Delivery and Estimated Unadjusted and Adjusted OR, OR1

CharacteristicN% LossOROR1P
698929.5
Education
 Primary28537.911
 Started secondary95734.40.860.74*
 Left school 15–16 y383129.30.68* 0.66*
 Left school 17–18 y68533.90.840.89
 College105524.20.52* 0.57
 University17635.80.911.12<0.0001
Marital status
 Married389625.411
 Single42344.62.37* 1.66*
 Living together46542.92.21* 1.73*
 Other9549.22.84* 2.27* <0.0001
Maternal smoking prepregnancy
 None351425.811
 1–9 Cigarettes/d85933.01.41* 1.09
 10–19 Cigarettes/d122734.11.49* 1.01
 ≥20 Cigarettes/d138936.11.63* 0.890.350
Gestation at FCV
 <16 Wk214723.911
 16–20 Wk237028.11.241.21*
 >20 Wk247237.71.921.71* <0.0001
Maternal anxiety FCV
 None290226.711
 Mild336231.21.24* 1.08
 Moderate66838.81.73* 1.17
 Severe5747.42.47* 1.260.135
Maternal depression FCV
 None470227.411
 Mild199935.31.45* 1.13*
 Moderate25639.11.70* 1.28*
 Severe3253.13.01* 1.45* 0.039
Maternal smoking FCV
 None429126.511
 1–9 Cigarettes/d117032.21.32* 0.96
 10–19 Cigarettes/d92337.51.66* 1.20
 ≥20 Cigarettes/d60541.01.92* 1.300.152
Maternal smoking late pregnancy
 None423126.311
 1–9 Cigarettes/d101034.51.48* 1.18
 10–19 Cigarettes/d89734.61.48* 1.13
 ≥20 Cigarettes/d87139.71.85* 1.350.228
Maternal age at birth
 <20 Y100343.31.71* 1.27*
 20–24 Y203925.20.75* 0.83*
 25–29 Y267030.811
 30–34 Y94725.30.76* 0.81*
 ≥35 Y33029.70.940.990.0001
Gender of the child
 Male362629.811
 Female336330.71.041.050.508
Gestation at birth
 22–35 wks17935.21.311.28
 36–37 wks52934.21.25* 1.21
 38–39 wks242430.31.051.10
 ≥40 wks185729.3110.084
SGA
 No625229.311
 Yes73737.51.44* 1.27* 0.005
  • OR1 adjusted for all other variables in Table.

    Probability obtained from maximum-likelihood test for overall variation among categories, adjusted analysis.

  • * 95% CI excludes unity.