You are viewing the site in preview mode

Skip to main content

Table 3 Covariate-Adjusted Differences in Mean Gestational Age (Days) at Delivery Associated with Frequency of Hair Product Use During Pregnancy (n = 154)

From: Endocrine disrupting chemical-associated hair product use during pregnancy and gestational age at delivery: a pilot study

    Hair Oil   Hair Lotion   Leave-In Conditioners
Model Timepoint    Model Aa Model Bb   Model Aa Model Bb   Model Aa Model Bb
Frequency n β (95% CI) n β (95% CI) n β (95% CI)
Visit 1   134    136    134   
Daily 7 -4.9 (-15.1, 5.4) -5.8 (-16.3, 4.7) 4 3.9 (-9.7, 17.4) 3.1 (-10.7, 16.9) 7 5.1 (-5.3, 15.4) 5.1 (-5.3, 15.6)
 < Daily 18 1.0 (-5.7, 7.6) 0.5 (-6.7, 7.7) 17 -3.2 (-10.0, 3.5) -3.8 (-10.7, 3.2) 20 1.7 (-4.7, 8.1) 1.7 (-4.8, 8.2)
Never 109 0 (ref) 0 (ref) 115 0 (ref) 0 (ref) 107 0 (ref) 0 (ref)
Visit 2   136    136    137   
Daily 10 0.04 (-8.7, 8.8) -0.1 (-9.2, 9.0) 10 -0.8 (-9.7, 8.0) -1.1 (-10.3, 8.0) 6 -5.0 (-12.9, 2.8) -4.1 (-12.2, 4.0)
 < Daily 19 -2.3 (-8.9, 4.3) -2.2 (-8.9, 4.6) 17 -0.7 (-7.6, 6.2) -0.7 (-7.7, 6.3) 20 -0.4 (-4.5, 3.8) 0.0 (-4.2, 4.3)
Never 107 0 (ref) 0 (ref) 109 0 (ref) 0 (ref) 106 0 (ref) 0 (ref)
Visit 3   135    134    136   
Daily 14 -1.1 (-6.4, 4.2) -1.0 (-6.7, 4.6) 9 1.4 (-5.3, 8.0) 1.7 (-5.4, 8.7) 5 -2.4 (-11.0, 6.2) -2.5 (-11.5, 6.5)
 < Daily 12 -1.3 (-6.9, 4.3) -1.3 (-7.0, 4.5) 12 -2.4 (-8.0, 3.1) -2.3 (-8.0, 3.5) 20 -2.4 (-6.9, 2.0) -2.5 (-7.1, 2.2)
Never 109 0 (ref) 0 (ref) 113 0 (ref) 0 (ref) 111 0 (ref) 0 (ref)
Visit 4   129    127    129   
Daily 8 -7.9 (-14.3, -1.5) -8.3 (-14.9, -1.6) 3 -2.1 (-12.4, 8.2) -1.8 (-12.6, 9.0) 6 -2.2 (-9.6, 5.2) -2.1 (-9.6, 5.4)
 < Daily 18 0.9 (-3.5, 5.3) 0.9 (-3.8, 5.7) 12 -2.8 (-8.2, 2.6) -3.0 (-9.0, 3.0) 17 -0.4 (-5.0, 4.2) -0.4 (-5.0, 4.3)
Never 103 0 (ref) 0 (ref) 112 0 (ref) 0 (ref) 106 0 (ref) 0 (ref)
  1. aAdjusted for maternal age at enrollment (years) and delivery method (cesarean, induced vaginal, spontaneous vaginal)
  2. bAdditionally adjusted for maternal race/ethnicity (non-Hispanic Black, non-Hispanic White, Other race/ethnicity)
Back to article page

Environmental Health

ISSN: 1476-069X