Table 4. Parametric Survival Analysis of Clinical Predictors of Relapse-Time Data.

Source	DF	Chi-Square	P
Site	2	9.76	0.0078
HRSD at continuation trial baseline	1	3.38	0.07
Age	1	11.56	0.0007
Total No. of Antidepressant Trials, Current Episode	1	5.52	0.02
Psychosis (Yes/No)	1	0.11	0.74
Unipolar vs. Bipolar	1	2.47	0.12
HRSD at preECT study entry	1	0.02	0.88
ECT assignment (BL VS RUL)	1	0.01	0.91
Total No. of ECT	1	1.29	0.26