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Table 1 Population characteristics and abstinence at the 12-month and at the long-term follow-up, % (number) except for age

From: Long-term follow-up of a high- and a low-intensity smoking cessation intervention in a dental setting– a randomized trial

 

Total

High-intensity treatment

Low-intensity treatment

p-value*

(N = 284)

(nHIT= 141)

(nLIT= 143)

Gender:

    

Men

20 (58/284)

18 (26/141)

22 (32/143)

.410

Women

80 (226/284)

82 (115/141)

78 (111/143)

Age at baseline †:

    

mean (SD)

48.6 (10.3)

48.7 (9.6)

48.5 (11.0)

 

median

49.0

48.0

49.0

.825

quartiles

42.0; 56.0

42.0; 56.0

41.0; 56.0

 

Education in years †:

    

0 - 9

22 (61/278)

18 (25/137)

26 (36/141)

.336

10 - 12

41 (115/278)

44 (60/137)

39 (55/141)

≥ 13

37 (102/278)

38 (52/137)

35 (50/141)

Number of smoked cigarettes/week at baseline †:

    

mean (SD)

106 (45)

106 (50)

105 (40)

 

median

105

105

105

.794

quartiles

70; 140

70; 140

70; 140

 

Intention to quit at baseline †:

    

not within 6 months

1 (4/278)

1 (1/137)

2 (3/141)

.120

within 6 months

50 (139/278)

46 (63/137)

54 (76/141)

within 1 month

48 (133/278)

52 (71/137)

44 (62/141)

trying just now

1 (2/278)

1 (2/137)

0 (0/141)

12-month follow-up:

    

Point prevalence abstinence‡

19 (55/284)

23 (32/141)

16 (23/143)

.159

of which:

    

< 6 months

5 (15/284)

4 (6/141)

6 (9/143)

.443

≥ 6 months§

14 (40/284)

18 (26/141)

10 (14/143)

.036

Long-term follow-up:

    

Point prevalence abstinence

27 (78/284)‡

31 (44/141)‡

24 (34/143)‡

.161

31 (76/241)║

35 (43/121)║

27 (33/120)║

.179

6-month continuous abstinence

22 (63/284)‡

26 (36/141)‡

19 (27/143)‡

.177

25 (61/241)║

29 (35/121)║

22 (26/120)║

.195

Sustained abstinence

9 (24/284)‡

12 (17/141)‡

5 (7/143)‡

.030

10 (24/241)║

14 (17/121)║

6 (7/120)║

.033

  1. * Statistical significant difference between HIT and LIT tested with chi-square test, except for age and number of cigarettes at baseline which were tested with Mann–Whitney U-test.
  2. † Information from 278 participants (137 HIT, 141 LIT) because six did not reply to the baseline questionnaire.
  3. ‡ According to intention-to-treat, non-responders treated as smokers.
  4. § Equal to 6-month continuous abstinence.
  5. ║ Responder-only abstinence.
  6. p-value for grouping into “not within 6 months/within 6 months” vs. “within 1 month/trying just now” because 4 cells (50.0%) had expected count less than 5 in the original grouping.
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BMC Public Health

ISSN: 1471-2458

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