Table 1 Summary of data from subjects
GroupnAge (years)Smoking habitGenderDisease duration (years)UPSIT scoreSubjects with high PD probability22 on UPSIT (n (%))
Smokers (n (%))Women (n (%))
Control13664.9 (8.8)13 (11.1)64 (47.1)29.5 (5.3)18 (13.2)
ET2669.0 (9.3)5 (22.7)18 (69.2)11.4 (12.4)27.9 (4.0)4 (15.4)
D1666.7 (6.8)3 (21.4)9 (56.3)19.7 (9.9)27.6 (7.5)4 (25.0)
SWEDDs2165.4 (11.4)4 (23.5)11 (52.4)9.3 (9.1)27.3 (5.0)5 (23.8)
PD19165.6 (10.7)12 (6.7)77 (40.3)10.2 (6.3)17.6 (6.2)163 (85.3)
  • Values are mean (SD).

  • Possible UPSIT result range: 0–40.

  • Smoking habit displays percentage among those subjects who provided information about tobacco consumption.

  • D, idiopathic dystonia; ET, essential tremor; n, number of subjects; PD, Parkinson’s disease; SWEDDs, patients with scans without evidence of dopaminergic deficit; UPSIT, University of Pennsylvania Smell Identification Test.