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Table 4 Abstinence (point prevalence and continuous) by sex, education level and number of smoked cigarettes at baseline, as well as odds ratios for the two abstinence standards, using all randomized subjects.

From: Comparison of a high and a low intensity smoking cessation intervention in a dentistry setting in Sweden – a randomized trial

  Point prevalence abstinence Continuous abstinence
  % (n/N) OR (95% CI) % (n/N) OR (95% CI)
Education: 0–9 years     
LIT (ref.) 8 (3/37) 1.0 5 (2/37) 1.0
HIT 20 (6/30) 2.8 (0.6–12.5) 13 (4/30) 2.7 (0.5–15.8)
Education: ≥ 10 years     
LIT (ref.) 19 (21/111) 1.0 10 (11/111) 1.0
HIT 25 (29/116) 1.4 (0.8–2.7) 20 (23/116) * 2.2 (1.04–4.9) *
N of cigarettes: ≥ 20/day     
LIT (ref.) 7 (4/54) 1.0 2 (1/54) 1.0
HIT 13 (6/45) 1.9 (0.5–7.3) 13 (6/45) * 8.2 (0.9–70.5)
N of cigarettes: 10–19/day     
LIT (ref.) 19 (14/75) 1.0 12 (9/75) 1.0
HIT 24 (18/76) 1.4 (0.6–3.0) 17 (13/76) 1.5 (0.6–3.8)
N of cigarettes: 0–9/day     
LIT (ref.) 32 (6/19) 1.0 16 (3/19) 1.0
HIT 44 (11/25) 1.7 (0.5–5.9) 32 (8/25) 2.5 (0.6–11.2)
Sex: Male     
LIT (ref.) 12 (4/34) 1.0 6 (2/34) 1.0
HIT 23 (7/30) 2.3 (0.6–8.7) 17 (5/30) 3.2 (0.6–17.9)
Sex: Female     
LIT (ref.) 18 (20/114) 1.0 10 (11/114) 1.0
HIT 24 (28/116) 1.5 (0.8–2.8) 19 (22/116) 2.2 (1.01–4.8) *
  1. Note: Tests of homogeneity of the ORs over education, intensity of smoking and sex, using the Breslow-Day test, showed that the null hypothesis of homogeneity could not be rejected for any of the variables.
  2. * Statistically significant difference between the programs at the 5% level
  3. Point prevalence abstinence = not smoked at all in the seven days prior to follow-up. Continuous abstinence = not smoked at all in the 6 months (≥ 183 days) prior to follow-up.