Table 5.
Sex/education stratum |
Glioma |
|
---|---|---|
Ca/Co | OR (95% CI) | |
Males and females combined
|
|
|
Ever regular smoking-education interaction p = 0.010 |
|
|
Ever versus never regular smoking, lower education |
64/186 |
1.33 (0.62-2.85) |
Ever versus never regular smoking, higher education |
102/462 |
0.48 (0.25-0.91) |
Males only
|
|
|
Ever regular smoking-education interaction p = 0.032 |
|
|
Ever versus never regular smoking, lower education |
39/87 |
2.79 (1.08-7.18) |
Ever versus never regular smoking, higher education |
66/230 |
0.85 (0.49-1.48) |
Females only
|
|
|
Ever regular smoking-education interaction p = 0.066 |
|
|
Ever versus never regular smoking, lower education |
25/99 |
1.31 (0.53-3.22) |
Ever versus never regular smoking, higher education | 36/232 | 0.42 (0.19-0.95) |
Models were of ever regular smoking as a binary variable, with the addition of an interaction term of ever regular smoking and education level. The reference groups in all comparisons are never regular smokers in the appropriate sex and education stratum. Analyses were adjusted for age (decades); sex (in the analysis of males and females combined); and region (Montreal, Ottawa, Vancouver). Covariates were removed from the model if they were non-significant and did not change any of the smoking ORs by more than 10%.