Table 4.

Logistic Regression Models for Longer Duration of Untreated Psychosis (DUP)

Variables	Bivariate			Model E Multiple logistic regression model			Model F Regression model after stepwise backward elimination			Model G Controlling for known risk factors for DUP			Model H Controlling for individual-level general SES
	OR	95% CI	P	OR	95% CI	P	OR	95% CI	P	OR	95% CI	P	OR	95% CI	P
F1 - General SES	1.058	0.976–1.147	0.170	1.174	1.041–1.323	0.009	1.119	1.019–1.230	0.019	1.164	0.973–1.391	0.097	1.215	0.990–1.491	0.062
F2 - Race/ethnicity/unemployment	0.981	0.867–1.110	0.762	0.972	0.827–1.144	0.735
F3 - Residential instability	0.976	0.641–1.487	0.911	1.060	0.637–1.763	0.824
F4 - Low household value	1.025	0.660–1.591	0.913	2.024	0.879–4.661	0.098
NDS	1.053	1.007–1.101	0.023	1.090	1.032–1.151	0.002	1.075	1.023–1.131	0.005	1.132	1.027–1.248	0.012	1.146	1.032–1.273	0.011
Mode of onset	2.529	1.398–4.577	0.002							3.219	1.346–7.699	0.009	3.345	1.362–8.217	0.008
History of incarcerations	1.159	0.508–2.644	0.727							0.760	0.169–3.424	0.721	0.461	0.070–3.037	0.421
Age at first cannabis use	0.803	0.670–0.963	0.018							0.860	0.639–1.159	0.322	0.869	0.639–1.182	0.372
Individual-level general SES	0.921	0.492–1.722	0.796										0.553	0.168–1.817	0.329
*Nagelkerke R2				19.3%			13.9%			43.1%			44.7%

Note: OR represents Odds Ratio; CI = Confidence Interval;

^*Nagelkerke’s pseudo R² reflects the model fit