Table 3 Baseline characteristics of those with and without a change in clinical diagnosis in all patients and in those initially diagnosed with Parkinson’s disease
All patientsPatients initially diagnosed with PD
No change in diagnosis (n = 44)Change in diagnosis (n = 22)No change in diagnosis (n = 33)Change in diagnosis (n = 13)
Age (years) (mean (SD))74.4 (10.1)77.5 (6.4)74.3 (10.4)76.8 (7.4)
% Male54.577.348.576.9
Symptom duration (months) (median (IQR))12.7 (6.8–24.2)12.4 (8.0–20.9)12.4 (7.2–24.1)12.2 (8.0–19.2)
Symptoms described at baseline (n (%))
    Tremor37 (84.1)17 (77.3)30 (90.9)11 (84.6)
    Bradykinesia31 (70.5)15 (68.2)24 (72.7)10 (76.9)
    Gait disturbance35 (79.5)19 (86.4)25 (75.6)12 (92.3)
    Postural instability23 (52.3)14 (63.6)15 (45.5)9 (69.2)
MMSE (median (IQR))28 (26–29)25 (24–28)28 (26–29)27 (24–28)
MMP (median (IQR))28 (24–30)25 (22–28)29 (26–30)26 (23–28)
Motor UPDRS (mean (SD))25.7 (11.7)26.4 (8.8)27.5 (12.1)24.0 (8.8)
Total UPDRS (mean (SD))37.9 (17.3)38.9 (14.0)39.5 (18.7)35.5 (12.5)
  • MMP, Mini-Mental Parkinson; MMSE, Mini-Mental State Examination; PD, Parkinson’s disease; UPDRS Unified Parkinson’s Disease Rating Scale.