Variable | Univariable analysis | Multivariable analysis | ||
OR | 95% CI | OR | 95% CI | |
Restaurant mean COF (0.1) | 0.65 | 0.47 to 0.90* | 0.59 | 0.42 to 0.82* |
Age (decade) | 0.83 | 0.62 to 1.10 | 0.83 | 0.69 to 1.00 * |
Gender | ||||
Male | 2.30 | 1.14 to 4.64 * | 2.32 | 1.09 to 4.95 * |
Female | – | – | – | – |
Ethnic group | ||||
Others | 0.89 | 0.39 to 2.01 | 1.14 | 0.61 to 2.14 |
Non-Hispanic white | – | – | – | – |
Tenure (1 year) | 0.94 | 0.83 to 1.07 | 0.99 | 0.91 to 1.09 |
Hours worked (5 h) | 0.89 | 0.76 to 1.05 | 0.80 | 0.64 to 1.00 * |
Shift start time | ||||
After 09:00 hours | 0.70 | 0.31 to 1.59 | 0.58 | 0.18 to 1.84 |
Before 09:00 hours | – | – | – | – |
Gross contamination on sole | ||||
Yes | 2.20 | 0.99 to 4.89 | 3.25 | 1.33 to 7.94 * |
No | – | – | – | – |
Shoe sole wear | ||||
Worn | 1.35 | 0.57 to 3.22 | 1.80 | 0.61 to 5.30 |
Not worn | – | – | – | – |
Slip-resistant shoes | ||||
Yes | 0.96 | 0.38 to 2.45 | 1.06 | 0.32 to 3.53 |
No | – | – | – | – |
↵* Significant at p<0.05.
The unit of change for continuous variables is shown in parentheses.
COF, coefficient of friction; OR, odds ratio.