Research Article

Diagnostic Validation for Participants in the Washington State Parkinson Disease Registry

Table 1

Clinical and demographic characteristics of the study cohort.

Assessed in-person Not assessed in-person Combined cohort valuea

MDS-UPDRS Part III, mean (SD)37.0 (18.0)N/AN/AN/A
Hoehn and Yahr scale score median (range)2 (1–5)N/AN/AN/A
Mean (SD)2.5 (0.9)
Bradykinesia, (%)77 (100)29 (100)106 (100)1.0b
Rigidity, (%)73 (94.8)29 (100)102 (96.2)0.57b
Resting tremor, (%)51 (66.2)24 (82.8)75 (70.8)0.15b
Postural instability, (%)30 (39.0)19 (65.5)49 (46.2)0.02b
Male, (%)59 (76.6)20 (69.0)79 (74.5)0.46b
Disease duration, mean (SD)11.0 (7.5)10.7 (7.3)10.9 (7.4)0.89c
Age at assessment, mean (SD)69.7 (8.4)66.6 (12.3)68.8 (9.6)0.15c
Duration between enrollment and assessment (years), Mean (SD)d2.7 (1.0)N/AN/AN/A

aComparing patients in the “assessed in-person” and “not assessed in-person” groups; bFisher’s exact test; cunpaired t-test; dcalculated only for “assessed in-person” group since data ascertained for the “not assessed in-person” group was sometimes derived from clinical or research visits that occurred before enrollment in the WPDR validation study.