Table 3.
Odds Ratios (ORs) and 95% confidence intervals (CIs) of total injuries (excluding traffic) from drinking, location context and their joint effects as well as the interaction between drinking and context on additive and multiplicative scale
| Conditional logistic regression estimates | Interaction on additive scale | Interaction on multiplicative scale | |||||
|---|---|---|---|---|---|---|---|
| Context | Volume | OR context at volume = 0 | OR volume at private residence1 | OR for both Context & volume | RERI2 | SI3 | Multiplicative effect4 |
| Street/public place | 0.1-3.0 | 14.23 (12.27, 16.51) | 2.98 (2.40, 3.71) | 44.07 (25.99, 74.74) | 27.86* (4.73, 50.99) | 2.83*** (1.64, 4.88) | 1.04 (0.59, 1.84) |
| 3.1-7.0 | 5.97 (4.47, 7.98) | 60.94 (35.11, 105.78) | 41.73* (8.31, 75.16) | 3.29*** (1.87, 5.80) | 0.72 (0.39, 1.33) | ||
| >7.0 | 8.96 (6.63, 12.11) | 116.10 (67.59, 199.41) | 93.90** (31.44, 156.36) | 5.43*** (3.13, 9.42) | 0.91 (0.50, 1.67) | ||
| Drinking establishment | 0.1-3.0 | 5.21 (3.76, 7.22) | 2.98 (2.40, 3.71) | 8.38 (5.59, 12.55) | 1.19 (−2.51, 4.89) | 1.19 (0.71, 2.01) | 0.54* (0.31, 0.93) |
| 3.1-7.0 | 5.97 (4.47, 7.98) | 10.74 (7.45, 15.48) | 0.56 (−3.83, 4.94) | 1.06 (0.67, 1.68) | 0.35*** (0.20, 0.59) | ||
| >7.0 | 8.96 (6.63, 12.11) | 14.51 (10.29, 20.47) | 1.34 (−4.09, 6.78) | 1.11 (0.73, 1.68) | 0.31*** (0.18, 0.52) | ||
| Workplace | 0.1-3.0 | 1.61 (1.44, 1.81) | 2.98 (2.40, 3.71) | 3.99 (2.64, 6.03) | −2.93 (−7.82, 2.10) | 1.15 (0.64, 2.06) | 0.83 (0.53, 1.30) |
| 3.1-7.0 | 5.97 (4.47, 7.98) | 11.15 (5.20, 23.89) | 4.56 (−4.04, 13.17) | 1.82 (0.75, 4.39) | 1.16 (0.51, 2.60) | ||
| >7.0 | 8.96 (6.63, 12.11) | 2.68 (1.21, 5.94) | −6.89*** (−10.18, −3.60) | 0.20* (0.05, 0.70) | 0.19*** (0.08, 0.42) | ||
| Others | 0.1-3.0 | 5.66 (5.00, 6.41) | 2.98 (2.40, 3.71) | 7.54 (5.11, 11.13) | −0.10 (−3.05, 2.85) | 0.99 (0.63, 1.55) | 0.45*** (0.29, 0.69) |
| 3.1-7.0 | 5.97 (4.47, 7.98) | 10.02 (6.03, 16.65) | −0.61 (−5.86, 4.65) | 0.94 (0.53, 1.67) | 0.30*** (0.17, 0.53) | ||
| >7.0 | 8.96 (6.63, 12.11) | 14.62 (8.77, 24.37) | 1.00 (−6.61, 8.61) | 1.08 (0.61, 1.89) | 0.29*** (0.16, 0.51) | ||
p<0.05,
p<0.01,
p<0.001
Private residence was used as the reference category
Relative Excess Risk due to Interaction (RERI): Significance test of RERI=0 with null hypothesis indicating non-significant interaction on additive scale, or the interaction is additive
Synergy Index (SI): Significance test of SI=1 with null hypothesis indicating non-significant interaction on additive scale, or the interaction is additive
Significance test of multiplicative effect=1 with null hypothesis indicating non-significant interaction on multiplicative scale, or the interaction is multiplicative