Table 1 Characteristics of 37 cases and 37 control subjects

CharacteristicCasesControl subjectsSignificance
Values are means (SD) or numbers (%).
NA = not applicable.
Age, y68.9 (6.3)67.3 (8.8)t = 0.94, p = 0.35
Sex, M21 (56.8%)18 (48.6%)χ2 = 0.49, p = 0.49
Ethnicity, White36 (97.3%)35 (94.6%)Fisher’s exact test, p = 1.00
Education, y15.7 (2.8)15.8 (2.8)t = 0.21, p = 0.84
Past cigarette smoker14 (37.8%)16 (43.2%)χ2 = 0.22, p = 0.64
Pack years among past cigarette smokers25.2 (20.3)14.8 (18.2)t = 1.48, p = 0.15
Disease duration, y18.9 (16.1)NANA
Total tremor score19.1 (6.7)3.8 (2.4)t = 13.06, p < 0.001
Currently taking a medication to treat tremor10 (27.0%)NANA