Table 4. Independent significant predictors of a higher score in Hamilton Depression (HAM-D) (depression screening).
| Independent variable* | Unstandardized Coefficients B | p value | 95.0% Confidence Interval for B | |
|---|---|---|---|---|
| Lower Bound | Upper Bound | |||
| Modified Hoehn and Yahr stage | 1.14 | <0.001 | 0.685 | 1.596 |
| Lower Barthel index | -0.066 | <0.001 | -0.102 | -0.029 |
| Smoking (self) | 1.501 | 0.156 | -0.58 | 3.583 |
| Presence of a caregiver | 0.122 | 0.907 | -1.936 | 2.179 |
| Level of education | 1.645 | 0.084 | -0.223 | 3.514 |
| Dose of ropinirole for the last 2 months | 1.389 | 0.045 | 0.034 | 2.743 |
*Independent variables with a p<0.05 in unadjusted analysis were selected for linear regression shown here. All variables assessed are given in S1 Table.