Table 4.
Results of Mixed Effects Regression Models [SE=Standard error].
| Intervention effect estimate | N | SE | P-value | |
|---|---|---|---|---|
|
|
||||
| Model 1 – Unadjusteda | 1.54 | 604 | 0.80 | 0.06 |
| Model 2 – Adjustedb | 1.58 | 604 | 0.59 | 0.01 |
| Model 3 – Adjustedc | 1.64 | 600 | 0.63 | 0.01 |
a
Dependent variable is the change in pre- and post- B-SAFE exposure safety climate score. Independent variable is worksite treatment status (control or intervention). Random effect is site.
b
Same parameters as Model 1. Also adjusted for worksite pair.
c
Same parameters as Model 2. Also adjusted for worker trade, title, age, race/ethnicity, month started on-site, total amount of time on-site.