Restaurant-level variables (n=36) |

Mean Ra (μm)^{*} |

Mean (SD) | 3.7 (1.1) |

Median (range) | 3.2 (2.2 to 6.1) |

Mean Rpm (μm)^{*} |

Mean (SD) | 14.4 (4.4) |

Median (range) | 12.8 (8.2 to 26.2) |

Mean coefficient of friction (0 to 1)^{†} |

Mean (SD) | 0.67 (0.08) |

Median (range) | 0.68 (0.45 to 0.86) |

Floor-cleaning frequency/day (n, %) |

1 | 7 (19.4) |

2 | 11 (30.6) |

3 | 6 (16.7) |

4 | 7 (19.4) |

5 | 2 (5.6) |

6+ | 3 (8.3) |

Individual-level variables (n=422) |

Slip-resistant shoe (n, %) | 286 (67.8) |

Rate of slipping per 40 work hours |

Mean (SD) | 0.69 (1.77) |

Median (range) | 0.14 (0.00 to 22.22) |

Rate of major slips^{‡} per 40 work hours |

Mean (SD) | 0.052 (0.25) |

Median (range) | 0.00 (0.00 to 3.73) |