Table 2.
Odds Ratios (OR) and 95% Confidence Intervals (CI) for Risk of Injury Related to Drinking from Conditional Logistic Regression Comparing the Categorical Step-function and Fractional Polynomial Estimations (18 countries, n=13,119)
| Step function estimation | Fractional Polynomial estimation | |||||||
|---|---|---|---|---|---|---|---|---|
| Alcohol intake in drinks |
Mean volume | OR2 | LO2 | HI2 | Alcohol intake in drinks |
OR2 | LO2 | HI2 |
| (0, 1]1 | 0.8 | 2.7 | 2.0 | 3.6 | 1 | 2.3 | 2.1 | 2.4 |
| (1, 2] | 1.6 | 2.8 | 2.2 | 3.6 | 2 | 3.5 | 3.2 | 3.9 |
| (2, 3] | 2.6 | 4.1 | 3.1 | 5.4 | 3 | 4.6 | 4.1 | 5.2 |
| (3, 4] | 3.5 | 3.9 | 2.9 | 5.3 | 4 | 5.7 | 5.0 | 6.5 |
| (4, 5] | 4.6 | 6.9 | 5.1 | 9.4 | 5 | 6.7 | 5.8 | 7.6 |
| (5, 6] | 5.7 | 7.3 | 4.8 | 11.0 | 6 | 7.5 | 6.5 | 8.7 |
| (6, 7] | 6.4 | 5.4 | 3.8 | 7.8 | 7 | 8.3 | 7.2 | 9.7 |
| (7, 8] | 7.5 | 12.6 | 7.5 | 21.1 | 8 | 9.0 | 7.8 | 10.5 |
| (8, 9] | 8.6 | 8.1 | 4.8 | 13.5 | 9 | 9.7 | 8.3 | 11.3 |
| (9, 10] | 9.5 | 9.8 | 6.8 | 14.0 | 10 | 10.2 | 8.7 | 12.0 |
| (10, 15] | 12.5 | 13.1 | 9.4 | 18.1 | 15 | 12.3 | 10.2 | 14.9 |
| (15, 20] | 17.4 | 18.5 | 11.7 | 29.2 | 20 | 13.4 | 10.7 | 16.8 |
| (20, 30] | 24.1 | 21.4 | 11.1 | 41.2 | 30 | 13.9 | 10.1 | 19.0 |
| (30, 45] | 36.6 | 8.3 | 3.6 | 19.1 | 45 | 12.7 | 8.1 | 20.0 |
| (45, 60] | 54.0 | 10.4 | 2.3 | 46.6 | 60 | 10.9 | 6.1 | 19.6 |
| >60 | 98.3 | 3.4 | 1.1 | 10.1 | 80 | 8.6 | 4.1 | 18.1 |
1
(a,b] means ≤b and >a
2
OR: odds ratio; LO, HI: lower and higher limits of the 95% confidence interval