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Table 1 Baseline demographic characteristics between No Letter and Letter groups

From: To send or not to send: weighing the costs and benefits of mailing an advance letter to participants before a telephone survey

Variable

Groupa

No Letter (n = 138)

Letter (n = 137)

Age, mean years (SD)

47.5 (12.9)

48.7 (12.1)

Female sex

70 (50.7)

70 (51.1)

Married or common-law spouse

69 (50.0)

84 (61.3)

Employed full or part time

77 (56.2)

69 (50.4)

Education level

 Less than high school diploma

31 (22.5)

24 (17.5)

 High school diploma

63 (45.7)

66 (48.2)

 Postsecondary

44 (31.9)

47 (34.3)

Household income, $

 < 60,000

85 (64.4)

81 (62.3)

 ≥ 60,000

47 (35.6)

49 (37.7)

Cigarettes, mean (SD), days

18.3 (7.9)

18.4 (7.5)

FTND score, mean (SD)

4.8 (1.9)

5.1 (2.1)

Levels of nicotine dependencec

 Low

14 (10.4)

18 (13.4)

 Low to moderate

46 (34.1)

33 (24.6)

 Moderate

66 (48.9)

68 (50.7)

 High

9 (6.7)

15 (11.2)

Age at first smoking, mean (SD), years

15.4 (4.8)

14.5 (4.2)

Time as smoker, mean (SD), years

23.1 (13.9)

25.0 (14.7)

No. of previous quit attempts

 0

5 (3.6)

11 (8.0)

 1–5

95 (68.8)

89 (65.0)

 > 6

38 (27.5)

37 (27.0)

Previously used NRT (patch, gum, inhaler) in a quit attempt

70 (52.6)

86 (68.3)b

  1. FTND Fagerström Test for Nicotine Dependence; NRT nicotine replacement therapy
  2. aData are presented as number (percentage) of participants unless otherwise indicated. Sample sizes vary because of missing data on some variables
  3. bp < 0.05
  4. cLevel of nicotine dependence is based on the FTND scores. Scores range from 1 to 10, with higher scores indicating a more intense physical dependence on nicotine. Low dependence corresponds to a score of 1 or 2, low to moderate dependence a score of 3 or 4, moderate dependence a score of 5 to 7, and high dependence a score of 8 to 10