Table 3 Factors related to commencing smoking in 12-year-old students in Catalonia (Spain)
| Â | Logistic model | Multilevel logistic model |
|---|---|---|
| Â | OR [95%CI] | OR [95%CI] |
Age | 2.33[ 1.74- 3.11 ] | 2.27[1.85-2.79] |
Perception of tobacco as detrimental to health | ||
Agree | 1 | 1 |
Disagree | 2.76 [1.69 - 4.52] | 2.86 [1.74 - 4.63] |
Completely disagree | 10.74 [0.68 - 4.45] | 1.77 [0.67 - 4.58] |
Perception of tobacco as an addictive substance | ||
Agree | 1 | 1 |
Disagree | 3.50[1.82-6.76] | 3.46[1.79-6.67] |
Completely disagree | 3.50[1.82-6.76] | 3.46[1.79-6.67] |
Consumption in family and social setting | ||
Non-smoker mother | 1 | 1 |
Smoker or former smoker mother | 1.75[1.10-2.78] | 1.76 [1.10-2.84] |
Non-smoker siblings | 1 | 1 |
Smoker siblings | 1.99[1.29-3.05] | 2.02[1.31-3.11] |
Non-smoker friends | 1 | 1 |
Some smoker friends | 9.55[4.49-20.32] | 9.86[4.27-22.76] |
Almost all smoker friends | 32.75[14.03-76.43] | 36.31[14.25-92.47] |
All smoker friends | 66.40[18.40-239.61] | 75.64[18.37-311.41] |
Girl with smoker mother | 0.50[0.30-0.85] | 0.48[0.28-0.82] |
Carbon monoxide measurement in inspired air | ||
Co-oximetry < 6 p.p.m. | 1 | 1 |
Co-oximetry 6 to 10 p.p.m. | 2.29[1.08-4.84] | 2.29[1.07-4.91] |
Co-oximetry > 10 p.p.m. | 3.58 [1.32-9.72] | 3.94[1.38-11.30] |
Intercenter variation | ||
Intercenter variation | Â | 0.045 (n.s) |
Intercenter variation | ||
Mean number of students registered | Â | 1.007[1.001-1.013] |
Contrast adjustment | ||
Hosmer & Lemeshow | 7.32 P = 0.5022 | 9.27 p = 0.3201 |
ROC | 0.868[0.836-0.899] | 0.871[0.840-0.902] |