Table 1

Baseline characteristics of the participants

Male smokers randomised in the NELSON trial (first recruitment)Male smokers who responded to the smoking cessation questionnaire
Total (n=5161)Screen arm (n=581)Control arm (n=503)
N (%)*N (%)*N (%)*
Median age (IQR) years58 (7.0)57 (7)58 (8)
Level of education
 Low educational level2442 (48.0)280 (49.3)224 (44.9)
 Medium educational level1244 (24.5)136 (23.9)122 (24.4)
 High educational level1395 (27.5)152 (26.8)153 (30.7)
Marital status
 Married or living togetherNA475 (81.8)417 (82.9)
Pack-years
 ≤301207 (23.4)186 (32.0)144 (28.6)
 31–401810 (35.1)168 (28.9)161 (32.0)
 41–501143 (22.2)116 (20.0)116 (23.1)
 51–60540 (10.5)66 (11.4)47 (9.3)
 >60456 (8.8)45 (7.7)35 (7.0)
Age at starting smoking
≤15 years865 (16.8)87 (15.0)92 (18.3)
15–20 years3337 (64.7)392 (67.5)312 (62.0)
>20 years955 (18.5)102 (17.5)99 (19.7)
Intention to quit smoking (T0)
 Immotive2003 (39.9)229 (40.6)203 (41.1)
 Precontemplator769 (15.3)84 (14.9)81 (16.4)
 Contemplator1504 (30.0)173 (30.7)133 (26.9)
 Preparator743 (14.8)78 (13.8)77 (15.6)
Time to the first cigarette§
 ≤5 min963 (19.7)99 (18.1)80 (16.9)
 5–30 min2000 (40.8)206 (37.8)205 (43.2)
 30 min–1 h1217 (24.9)146 (26.7)120 (25.3)
 >1 h717 (14.6)95 (17.4)69 (14.6)
  • * Available data are presented as N (%) unless indicated otherwise.

  • Low educational level indicates primary, lower secondary general or lower vocational education; medium educational level, intermediate vocational education or higher secondary education; high educational level, higher vocational education or university.

  • Immotive indicates no intention to quit smoking within 1 year; precontemplator, intention to quit smoking within 1 year, but not within 6 months; contemplator, intention to quit smoking within 6 months, but not within 1 month; preparator, intention to quit smoking within the next month.

  • § First question of the Fagerström test for Nicotine Dependence (FTND).

  • NA, not applicable.