Table 2 |
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Multi-level logistic regression analyses examining factors associated with youth smoking behaviour (grades 9 to 12) |
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Adjusted Odds Ratio § (95% CI) |
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Model 1 Susceptible vs. Non-susceptible |
Model 2 Occasional smoker vs. Non-smoker |
Model 3 Daily smoker vs. Non-smoker |
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|
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Student-Level Characteristics |
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|
Sex |
Female |
1.00 |
1.00 |
1.00 |
|
Male |
0.93 (0.85, 1.01) |
0.92 (0.82, 1.03) |
1.12 (0.98, 1.28) |
|
|
Has an older sibling who smokes |
No |
1.00 |
1.00 |
1.00 |
|
Yes |
1.17 (1.04, 1.31)** |
1.81 (1.61, 2.03)*** |
2.51 (2.19, 2.87)*** |
|
|
Has a parent who smokes |
No |
1.00 |
1.00 |
1.00 |
|
Yes |
1.07 (0.97, 1.18) |
1.23 (1.10, 1.39)** |
1.89 (1.65, 2.17)*** |
|
|
Number of close friends who smoke |
None |
1.00 |
1.00 |
1.00 |
|
1 to 2 friends |
1.83 (1.65, 2.04)*** |
4.93 (4.29, 5.66)*** |
5.70 (4.47, 7.26)*** |
|
|
3 or more friends |
2.58 (2.17, 3.05)*** |
11.52 (9.89, 13.42)*** |
82.60 (66.19, 103.08)*** |
|
|
Grade |
9 |
1.00 |
1.00 |
1.00 |
|
10 |
0.77 (0.69, 0.86)*** |
1.19 (1.01, 1.41)* |
1.70 (1.39, 2.08)*** |
|
|
11 |
0.57 (0.50, 0.64)*** |
1.56 (1.32, 1.83)*** |
1.79 (1.46, 2.19)*** |
|
|
12 |
0.43 (0.37, 0.49)*** |
2.01 (1.71, 2.36)*** |
3.25 (2.68, 3.96)*** |
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School-Level Characteristics |
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Number of tobacco retailers |
Each retailer |
1.03 (1.01, 1.05)* |
0.99 (0.97, 1.01) |
1.00 (0.98, 1.02) |
|
Neighbourhood disadvantage |
Each % increase |
0.98 (0.94, 1.02) |
0.98 (0.95, 1.00) |
0.99 (0.97, 1.01) |
|
|
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Note: § Odds ratios adjusted for all other variables in the table. Model 1: 1 = Susceptible never smoker (n = 4,539), 0 = Non-susceptible never smoker (n = 10,822) Model 2: 1 = Occasional smoker (n = 2,242), 0 = Non-smoker (n = 20,522) Model 3: 1 = Daily smoker (n = 2,377), 0 = Non-smokers (n = 20,522) *p < .05 **p < .01 ***p < .001 |
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Chan and Leatherdale Tobacco Induced Diseases 2011 9:9 doi:10.1186/1617-9625-9-9 |
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