Table 4.
Polynomial Regression Model to Explore the Impact of Hours of Therapy on Motor Functional Independence Measure Change for American Spinal Injury Association Impairment Scale D Group
| Outcome–Motor FIM change | ||||
|---|---|---|---|---|
| Independent variable | Estimate | Std. error | 95% Wald CI | p |
| Intercept | 5.44 | 11.66 | −17.41, 28.30 | 0.641 |
| Age at injury | −0.04 | 0.09 | −0.21, 0.13 | 0.641 |
| Gender | ||||
| Female | 5.41 | 4.58 | −3.56, 14.39 | 0.237 |
| Male (reference) | - | - | - | - |
| Neurological level of injury | ||||
| C1–4 | −7.00 | 4.24 | −15.30, 1.30 | 0.098 |
| C5–8 | 0.56 | 4.35 | −7.97, 9.09 | 0.898 |
| T1–S5 (reference) | - | - | - | - |
| Pressure ulcer | ||||
| Yes | 1.95 | 4.89 | −7.64, 11.53 | 0.690 |
| No (reference) | - | - | - | - |
| Urinary tract infection | ||||
| Yes | 2.78 | 3.98 | −5.02, 10.58 | 0.485 |
| No (reference) | - | - | - | - |
| Pneumonia | ||||
| Yes | −7.16 | 7.88 | −22.61, 8.28 | 0.363 |
| No (reference) | - | - | - | - |
| Rehabilitation onset | 0.00 | 0.03 | −0.06, 0.06 | 0.994 |
| Total hours of therapy - linear | 0.61 | 0.11 | 0.39, 0.84 | <0.0001 |
| Total hours of therapy - quadratic | −0.002 | 0.001 | −0.003, −0.001 | <0.0001 |
Rehabilitation onset is defined as the days from injury to rehabilitation admission. FIM, Functional Independence Measure; Std. error, standard error; CI, confidence interval.