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Table 1 Baseline characteristics of sample

From: E-cigarettes and smoking cessation: a prospective study of a national sample of pregnant smokers

Characteristics

E-Cigarette & Cigarette dual user (n = 36)

Cigarette user (n = 392)

All (n = 428)

Age, M (SD)

26.86 (4.50)

26.35 (5.91)

26.39 (5.80)

Gestational age, in weeks, M(SD)

18.28 (7.48)

18.05 (7.79)

18.07 (7.75)

Body mass index (BMI), M(SD)

26.84 (5.45)

27.81 (7.95)

27.73 (7.77)

Race/Ethnicitya

 White

30 (83.33)

239 (61.13)

269 (63.00)

 Black/African-American

4 (11.11)

100 (25.58)

104 (24.36)

 Other

2 (5.56)

52 (13.30)

54 (12.65)

Education

  < 12 grade, no high school diploma

6 (16.67)

110 (28.06)

116 (27.10)

 High school graduate, GEDb or equivalent

12 (33.33)

130 (33.16)

142 (33.18)

 Some college

16 (44.44)

115 (29.34)

131 (30.61)

 College degree

2 (5.56)

37 (9.44)

39 (9.11)

Employment status

 Working part/full-time

13 (36.11)

125 (32.13)

138 (32.47)

 Not working

23 (63.89)

264 (67.87)

287 (67.53)

Annual household income

  < $15,000

22 (62.86)

209 (54.43)

231 (55.13)

 $15,001–$30,000

8 (22.86)

121 (31.51)

129 (30.79)

  > $30,000

5 (14.29)

54 (14.06)

59 (14.08)

Marital status

 Single, never married

12 (33.33)

156 (39.90)

168 (39.34)

 Living with significant other

9 (25.00)

128 (32.74)

137 (32.08)

 Married

8 (22.22)

80 (20.46)

88 (20.61)

 Divorced/Separated/Widowed

7 (19.44)

27 (6.91)

34 (7.96)

Health insurance

 Medicaid/Medicare

31 (86.11)

312 (80.00)

343 (80.52)

 Private, veterans or other

3 (8.33)

64 (16.41)

67 (15.73)

 None

2 (5.56)

14 (3.59)

16 (3.76)

Cigarettes smoked per day, M(SD)

8.44 (7.27)

7.41 (6.23)

7.50 (6.32)

Fagerstrom test for cigarette dependence (0–10), M(SD)

3.36 (2.54)

2.80 (2.25)

2.85 (2.28)

Motivation to quit (1–7), M(SD)

5.64 (1.53)

6.08 (1.28)

6.04 (1.31)

Region

 West

1 (2.78)

27 (6.89)

28 (6.54)

 Mid-west

6 (16.67)

94 (23.98)

100 (23.36)

 Northeast

2 (5.56)

60 (15.31)

62 (14.49)

 South

27 (75.00)

211 (53.83)

238 (55.61)

Allocated to intervention arm

20 (55.56)

188 (47.96)

208 (48.60)

  1. aSignificant difference (p ≤ 0.05) was observed between control and intervention group based on fisher exact test
  2. bGED General Educational Development test
  3. Note: Data are presentated as n(%) unless otherwise noted