Rate ratios (RR) and their 95% CI from univariate and multivariate regression models modelling the rate of slipping with restaurant-level perception of slipperiness
| Univariate | Multivariate | |||
|---|---|---|---|---|
| RR | 95% CI | RR | 95% CI | |
| Mean restaurant-level perception of slipperiness (1 point)* | 4.78 | 1.36 to 16.81 | 2.71 | 1.25 to 5.87 |
| Mean coefficient of friction (0.1)* | 0.77 | 0.65 to 0.92 | ||
| Slip-resistant shoes* | ||||
| Yes | 0.46 | 0.34 to 0.62 | ||
| No | 1 | – | ||
| Age (10 years)* | 0.70 | 0.58 to 0.85 | ||
| Body mass index (5 units) | 1.00 | 0.90 to 1.11 | ||
| Gender | ||||
| Men | 0.93 | 0.67 to 1.28 | ||
| Women | 1 | – | ||
| Job tenure (12 months) | 0.99 | 0.94 to 1.05 | ||
| Education | ||||
| Never attended* | 4.15 | 1.17 to 14.75 | ||
| Grades 1–11 | 1.20 | 0.83 to 1.72 | ||
| High school grad/GED | 0.98 | 0.65 to 1.48 | ||
| Some college and above | 1 | – | ||
| Language | ||||
| Portuguese | 0.31 | 0.04 to 2.55 | ||
| Spanish* | 0.45 | 0.29 to 0.70 | ||
| English | 1 | – | ||
| Chain | ||||
| Chain 1* | 0.66 | 0.47 to 0.91 | ||
| Chain 2 | 0.81 | 0.62 to 1.06 | ||
| Chain 3 | 1 | – | ||
Note: Limited-service restaurant workers, 2007–2008.
*Significant at α level of 0.05.