. Author manuscript; available in PMC: 2018 May 14.

Published in final edited form as: J Psychopharmacol. 2014 Mar 4;28(7):665–670. doi: 10.1177/0269881114523861

Table 1.

Sociodemographic and clinical characteristics.

Clinical characteristic	TD positive, n=13	TD negative, n=57	Test statistic for difference between groups
Sex			X²=0.34, df=1, p=0.561
Males, n (%)	8 (61.5%)	30 (52.6%)
Females, n (%)	5 (38.5%)	27 (47.4%)
Age, years, mean (SD)	39.6 (11.6)	42.0 (18.5)	t=0.45, df=68, p=0.653
Duration of antipsychotic treatment,	15.8 (7.9)	11.1 (7.4)	z= −2.075, p=0.0379
years, mean (SD)
Drug-induced Parkinsonism, n (%)	11 (84.6%)	24 (42.1%)	X²=7.65, df=1, p=0.006

TD: tardive dyskinesia; SD: standard deviation.