Table 1.
Model fit summary
| Unadjusted Model | Adjusted Model1 | Final Model | |||||||
|---|---|---|---|---|---|---|---|---|---|
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| Variable | HR | p-value | HR | p-value | HR2 | 95% CI | p-value | Std HR3 | |
| Injury Classification | |||||||||
| C1–C4, non-functional | 1.64 | 0.01 | NA | 4.87 | 2.32 | 10.20 | <0.0001 | ||
| C5–C8, non-functional | 0.97 | 0.85 | NA | 2.95 | 1.45 | 6.00 | 0.00 | ||
| Non-cervical, non-functional | 1.19 | 0.23 | NA | 3.19 | 1.58 | 6.44 | 0.00 | ||
| Cervical, ambulatory | 0.63 | 0.08 | NA | 1.14 | 0.48 | 2.71 | 0.77 | ||
| Non-cervical, ambulatory (referrent) | 1.00 | -- | 1.00 | -- | -- | -- | |||
| Biographic | |||||||||
| White | 0.84 | 0.25 | NA | 1.12 | 0.80 | 1.57 | 0.52 | ||
| Male sex | 1.06 | 0.72 | NA | 1.20 | 0.85 | 1.69 | 0.31 | ||
| Age at injury | 1.05 | <0.0001 | NA | 1.06 | 1.05 | 1.07 | <0.0001 | 2.29 | |
| Years since injury | 1.02 | 0.06 | NA | 1.05 | 1.03 | 1.08 | <0.0001 | 1.59 | |
| Environmental variables | |||||||||
| Years of education Low income | 0.93 | <0.01 | 0.96 | 0.08 | -- | ||||
| (Income<$20,000) | 1.76 | <0.0001 | 1.93 | <0.0001 | 1.83 | 1.34 | 2.51 | 0.00 | |
| Social support | 0.96 | 0.01 | 0.95 | <0.01 | 0.96 | 0.93 | 0.99 | 0.01 | 0.86 |
| Social upsets | 0.99 | 0.68 | 1.02 | 0.22 | -- | ||||
1
Estimated HR for environmental variables separately adjusted for injury and biographic variables only
2
Hazard ratios are adjusted for all variables that have estimates provided. Years of education and social upsets were not included in the final model.
3
The standardized HR are reported for 1 Std change in continuous variables