ANCOVA F-values (P, effect sizes—partial eta squared) per clinical/demographic variables
| Thyroid** | Depression*** | Anxiety*** | Total number of additional health conditions*** | |
| Age | PDQ: 8.2** (=0.005, 0.04) SSCI: 23.7*** (<0.001, 0.04) | PDQ: 2.9 (>0.05, 0.02) SSCI: 14.0*** (<0.001, 0.08) | PDQ: 2.6 (>0.05, 0.01) SSCI: 14.8*** (<0.001, 0.08) | PDQ: 15.9*** (<0.001, 0.08) SSCI: 27.8*** (<0.001, 0.14) |
| Gender | PDQ: 2.0 (>0.05, 0.01) SSCI: 0.1 (>0.05, 0.00) | PDQ: 7.6** (=0.006, 0.04) SSCI: 1.8 (>0.05, 0.01) | PDQ: 4.5* (=0.04, 0.03) SSCI: 0.9 (>0.05, 0.00) | PDQ: 3.1 (>0.05, 0.02) SSCI: 0.4 (>0.05, 0.00) |
| Education | PDQ: 42.3*** (<0.001, 0.20) SSCI: 17.1*** (<0.001, 0.12) | PDQ: 31.3*** (<0.001, 0.15) SSCI: 9.2**(=0.003, 0.05) | PDQ: 36.2***(<0.001, 0.17) SSCI: 12.9*** (<0.001, 0.07) | PDQ: 47.2*** (<0.001, 0.21) SSCI: 15.5*** (<0.001, 0.08) |
| Disease onset | PDQ: 16.2*** (<0.001, 0.09) SSCI: 19.1*** (<0.001, 0.10) | PDQ: 15.3*** (<0.001, 0.08) SSCI: 18.4*** (<0.001, 0.10) | PDQ: 14.4*** (<0.001, 0.08) SSCI: 17.4*** (<0.001, 0.05) | PDQ: 25.4*** (<0.001, 0.13) SSCI: 24.6*** (<0.001, 0.13) |
| Disease duration | PDQ: 2.8 (>0.05, 0.02) SSCI: 1.6 (>0.05, 0.00) | PDQ: 1.2 (>0.05, 0.00) SSCI: 0.6 (>0.05, 0.00) | PDQ: 2.0 (>0.05, 0.01) SSCI: 1.1 (>0.05, 0.00) | PDQ: 0.8 (>0.05, 0.00) SSCI: 0.5 (>0.05, 0.00) |
| MDS-UPDRS Part I | PDQ: 142.1*** (<0.001, 0.45) SSCI: 33.9*** (<0.001, 0.17) | PDQ: 93.4*** (<0.001, 0.35) SSCI: 16.1*** (<0.001, 0.09) | PDQ: 124.4*** (<0.001, 0.42) SSCI: 26.9*** (<0.001, 0.14) | PDQ: 95.6*** (<0.001. 0.35) SSCI: 19.1*** (<0.001, 0.10) |
| MDS-UPDRS Part II | PDQ: 77.2*** (<0.001, 0.31) SSCI: 33.2*** (<0.001, 0.16) | PDQ: 69.9*** (<0.001, 0.29) SSCI: 32.6*** (<0.001, 0.16) | PDQ: 87.4*** (<0.001, 0.33) SSCI: 42.2*** (<0.001, 0.20) | PDQ: 74.9*** (<0.001, 0.38) SSCI: 34.8*** (<0.001, 0.17) |
| NMSQ | PDQ: 12.9*** (<0.001, 0.07) SSCI: 0.9 (>0.05, 0.00) | PDQ: 13.1*** (<0.001, 0.07) SSCI: 0.8 (>0.05, 0.00) | PDQ: 8.7** (=0.004, 0.05) SSCI: 0.12 (>0.05, 0.00) | PDQ: 13.9*** (<0.001, 0.07) SSCI: 1.1 (>0.05, 0.00) |
| BOSS-PDmotor | PDQ: 19.5*** (<0.001, 0.10) SSCI: 9.2** (=0.003, 0.05) | PDQ: 16.2*** (<0.001, 0.08) SSCI: 6.7* (=0.010, 0.04) | PDQ: 17.8*** (<0.001, 0.09) SSCI: 8.1**(=0.005, 0.05) | PDQ: 21.7*** (<0.001, 0.11) SSCI: 10.9** (=0.001, 0.06) |
| BOSS-PDm-ADL | PDQ: 23.6*** (<0.001, 0.12) SSCI: 8.1** (=0.005, 0.05) | PDQ: 15.0*** (<0.001, 0.08) SSCI: 2.0 (>0.05, 0.01) | PDQ: 23.5*** (<0.001, 0.12) SSCI: 6.6* (=0.011, 0.04) | PDQ: 20.7*** (<0.001, 0.11) SSCI: 4.7* (=0.03, 0.03) |
df: (1, 170–175). *p<0.05 (trend); **p<0.01; ***p<0.001. Alpha set at 0.01.
ADL, activities of daily living; ANCOVA, analysis of covariance; BOSS-PD, Boston University Online Survey Study of Parkinson's Disease; MDS-UPDRS, Movement Disorders Society Unified Parkinson Disease Rating Scale; NMSQ, Non-Motor Symptoms Questionnaire; PDQ, Parkinson's Disease Questionnaire; SSCI, Stigma Scale for Chronic Illnesses.