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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).