Article Figures & Tables
Tables
- Table 1: Weighted distribution of characteristics among nonsmokers, by susceptibility to cigarette smoking, among students in grades 9-12
Characteristic Nonsmokers (n = 17 396) Nonsusceptible to cigarette smoking, no. (%)
(n =12 295)Susceptible to cigarette smoking, no. (%)
(n = 5 101)p value* Sex Female 6 485 (68.5) 2 672 (31.5) 0.003 Male 5 810 (71.9) 2 429 (28.1) 0.003 Grade 9 3 503 (66.8) 1 729 (33.2) < 0.0001 10 3 483 (67.5) 1 551 (32.5) < 0.0001 11 3 052 (73.0) 1 128 (27.0) < 0.0001 12 2 257 (75.3) 693 (24.7) < 0.0001 Province† Atlantic 4 279 (70.9) 1 625 (29.1) 0.2 Quebec 1 139 (72.2) 387 (27.8) 0.2 Ontario 2 062 (69.2) 915 (30.8) 0.2 Saskatchewan 1 501 (68.9) 706 (31.1) 0.2 Alberta 1 498 (70.0) 659 (30.0) 0.2 British Columbia 1 816 (71.5) 809 (28.5) 0.2 Race† White 9 317 (69.6) 3 774 (30.4) 0.2 Non-white 2 910 (71.4) 1 284 (28.6) 0.2 Overall self-esteem score† ≤ 8 3 735 (60.8) 2 318 (39.2) < 0.0001 9-11 6 400 (73.4) 2 258 (26.6) < 0.0001 ≥ 12 2 126 (79.2) 509 (20.8) < 0.0001 Academic performance† Levels 3 and 4 10 034 (71.3) 3 792 (28.7) < 0.0001 Level 3 1 611 (66.3) 914 (33.7) < 0.0001 Level 2 and lower 363 (59.0) 256 (41.0) < 0.0001 Any family member smoking† No 7 442 (74.1) 2 548 (25.9%) < 0.0001 Yes 4 246 (64.4) 2 245 (35.6%) < 0.0001 *Rao-Scott χ2 test of association.
†Some missing values for this variable in the study population.
Characteristic (reference category) Susceptibility to initiating smoking Model 1 Model 2 OR estimate 95% CI OR estimate 95% CI Smoke-free home (smoking permitted) Completely 0.687* (0.588-0.804) 0.787* (0.664-0.932) Sex (female) Male 1.072 (0.954-1.205) 1.039 (0.920-1.172) Grade (12) 9 1.481* (1.239-1.770) 1.458* (1.213-1.753) 10 1.441* (1.204-1.726) 1.461* (1.214-1.759) 11 1.108 (0.914-1.342) 1.129 (0.926-1.376) Province (Ontario)† Atlantic 0.853* (0.755-0.965) 0.862* (0.760-0.979) Quebec 0.708* (0.580-0.865) 0.729* (0.592-0.898) Saskatchewan 1.030 (0.901-1.178) 1.042 (0.907-1.196) Alberta 0.926 (0.789-1.087) 0.936 (0.793-1.103) British Columbia 0.857* (0.741-0.990) 0.882 (0.759-1.025) Race (non-white)† White 1.106 (0.968-1.263) 1.093 (0.952-1.255) Overall self-esteem score (≥ 12)† ≤ 8 2.240* (1.847-2.715) 2.198* (1.802-2.680) score 9-11 1.317* (1.092-1.589) 1.304* (1.075-1.583) School grade (levels 3 and 4)† Level 3 1.231* (1.067-1.421) 1.191* (1.027-1.381) Level 2 and lower 1.543* (1.103-2.160) 1.439* (1.004-2.061) Any family member who smokes (None)† ≥ 1 N/A N/A 1.349* (1.190-1.529) Note: CI = confidence interval, OR = odds ratio.
*Significant at the p = 0.05 level.
†Some missing values for this variable in the study population.
- Table 3: Multivariable logistic regression of susceptibility to smoking stratified by family smoking status
Characteristic (reference category) Susceptibility to initiating smoking No family smokers One or more family smokers OR estimate 95% CI OR estimate 95% CI Smoke-free home (smoking permitted) Completely 0.582* (0.428-0.791) 0.878 (0.721-1.071) Sex (female) Male 1.023 (0.871-1.200) 1.058 (0.879-1.275) Grade (12) 9 1.228 (0.964-1.564) 1.873* (1.406-2.494) 10 1.407* (1.107-1.789) 1.554* (1.163-2.078) 11 0.973 (0.753-1.258) 1.414* (1.035-1.931) Province (Ontario)† Atlantic 0.889 (0.749-1.056) 0.828* (0.686-0.999) Quebec 0.790 (0.597-1.046) 0.657* (0.482-0.895) Saskatchewan 1.119 (0.934-1.340) 0.933 (0.751-1.158) Alberta 0.928 (0.743-1.158) 0.922 (0.717-1.186) British Columbia 0.966 (0.795-1.175) 0.789 (0.622-1.001) Race (non-white)† White 1.259* (1.050-1.510) 0.867 (0.698-1.077) Overall self-esteem score (≥ 12)† ≤ 8 2.021* (1.578-2.588) 2.729* (1.970-3.781) 9-11 1.140 (0.898-1.448) 1.742* (1.265-2.400) School grade (levels 3 and 4)† Level 3 1.080 (0.873-1.335) 1.309* (1.061-1.615) Level 2 and lower 1.526* (1.024-2.272) 1.400 (0.813-2.410) Note: CI = confidence interval, OR = odds ratio.
*Significant at the p = 0.05 level.
†Some missing values for this variable in the study population.