Table 2.

Proportional Hazards Model of Predictor Variables

Variable	Cox proportional hazards model parameter	p value	Hazard ratio (95% confidence interval)
Female	+0.3192	0.0335	1.376 (1.025-1.847)
Any antipsychotic in the previous year	-0.4836	0.0262	0.617 (0.403-0.944)
Substance abuse diagnosis	-0.3133	0.0457	0.731 (0.538-0.994)
Pre-existing depression condition	+0.3948	0.0344	1.484 (1.029-2.139)
PANSS Davis anxiety/depression, change from baseline to 2 weeks	+0.0498 (per 1-point increase)	0.0320	1.051 (1.004-1.100) (per 1-point increase)
Barnes akathisia objective score, change from baseline to 2 weeks	+0.2962 (per 1-point increase)	0.0398	1.345 (1.014-1.783) (per 1-point increase)

Abbreviations: PANSS, positive and negative syndrome scale.