Table 6 Regression coefficients of the factors predicting BAC: demographic variables, alcohol drinking variables, time of initiation of alcohol drinking, and the usual drinking patterns
| Bivariate | Multivariate | ||||
|---|---|---|---|---|---|
|
Co-efficient (p-value) | Model 1: demographic data | Model 2: model 1 + drinking 6 h prior to the injury | Model 3: model 2 + the time of drinking | Model 4: model 3 + the usual drinking habits | |
| 1.Sex | -0.041 (0.094) | -0.032 (0.185) | -0.011 (0.614) | -0.015 (0.516) | -0.013 (0.587) |
| 2.Age | 0.003 (0.000)*** | 0.003 (0.000)** | 0.003 (0.000)*** | 0.003 (0.000)*** | 0.003 (0.000)*** |
| 3.Education | -0.016 (0.108) | 0.005 (0.625) | 0.008 (0.409) | 0.010 (0.282) | 0.011 (0.260) |
| 4.Resident | -0.014 (0.475) | -0.001 (0.951) | 0.009 (0.573) | 0.012 (0.494) | 0.012 (0.472) |
| 5.Total number of drinks | 0.013 (0.000)*** | 0.013 (0.000)*** | 0.013 (0.000)*** | 0.012 (0.000)*** | |
| 6.Drinking duration | 0.002 (0.679) | 0.002 (0.641) | 0.001 (0.795) | 0.001 (0.775) | |
| 7.Number of drinks per hour | 0.002 (0.218) | 0.002 (0.266) | 0.001 (0.726) | 0.001 (0.638) | |
| 8.Time between the last drink and the ED | -0.007 (0.069) | -0.004 (0.206) | -0.004 (0.207) | -0.004 (0.202) | |
| 9.Drinking the first drink during the popular period | -0.044 (0.042)* | -0.030 (0.189) | -0.028 (0.228) | ||
| 10.Drinking the first drink during the early part of the week | 0.002 (0.650) | -0.010 (0.803) | -0.013 (0.742) | ||
| 11.Drinking the last drink during the popular period | -0.051 (0.010)* | -0.010 (0.626) | -0.007 (0.734) | ||
| 12.Drinking the last drink during the early part of the week | 0.002 (0.660) | 0.013 (0.740) | 0.017 (0.674) | ||
| 13.Drinking frequently usually | -0.014 (0.004)** | -0.003 (0.540) | |||
| P-value of the model | 0.0017** | 0.0000*** | 0.0000*** | 0.0000*** | |
| R-squared | 0.1711 | 0.3841 | 0.4017 | 0.4045 |