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Table 2 Descriptive statistics of adverse birth outcomes

From: Electronic cigarettes may not be a “safer alternative” of conventional cigarettes during pregnancy: evidence from the nationally representative PRAMS data

   Complete abstainers
(N = 51,430)
Exclusive EC users
(N = 337)
Exclusive CC smokers
(N = 3,484)
Total
(N = 55,251)
SGA N 6,981 66 1,017 8,064
WP 8.62% 14.00% 21.86% 9.26%
95% CI 8.29–8.96% 8.88–21.38% 19.80–24.07% 8.93–9.60%
LBW N 9,073 86 1,149 10,308
WP 5.37% 7.34% 11.96% 5.68%
95% CI 5.18–5.57% 5.22–10.21% 10.81–13.22% 5.50–5.88%
Preterm N 7,674 66 752 8,492
WP 7.15% 11.74% 10.57% 7.33%
95% CI 6.86–7.44% 7.37–18.20% 9.26–12.05% 7.05–7.62%
  1. EC Electronic cigarette, CC Conventional cigarette, SGA Small-for-gestational-age, LBW Low birthweight
  2. Note: Statistics are given as unweighted frequency (N), survey-weighted percentage, (WP) and weighted 95% confidence intervals (95% CI).