Table 2. Correlations of demographics and clinical symptoms with the SF-36 and PDQ-39.
| Variables | SF-36 | PDQ-39 |
|---|---|---|
| Gender a | −0.05 | 0.13 |
| Age | −0.21* | 0.05 |
| Employment Status b | 0.39** | −0.30** |
| Years of Schooling | 0.09 | 0.07 |
| Age at Onset | −0.16 | −0.07 |
| Disease Duration (years) | −0.09 | 0.29** |
| Hoehn & Yahr Stage | −0.36** | 0.40** |
| MDS-UPDRS Part I | −0.60** | 0.59** |
| MDS-UPDRS Part II | −0.65** | 0.68** |
| MDS-UPDRS Part III | −0.34** | 0.26** |
| MDS-UPDRS Part IV | −0.18 | 0.28* |
| SLUMS | 0.27** | −0.15 |
| GDS | −0.68** | 0.64** |
| FSS | −0.49** | 0.41** |
a Gender was coded as 0 for female and 1 for male.
b Employment Status was coded as 0 for unemployed and 1 for employed.
MDS-UPDRS, Movement Disorder Society-Unified Parkinson’s Disease Rating Scale; SLUMS, Saint Louis University Mental Status Examination; GDS, Geriatric Depression Scale; FSS, Fatigue Severity Scale; SF-36, The 36-item Short Form Health Survey; PDQ-39, The 39-item Parkinson’s Disease Questionnaire.
* p < 0.05,
** p < 0.01 (all p are two-tailed).