Investigating factors associated with the number of rehospitalizations among patients with schizophrenia disorder using penalized count regression models

Table 6 Associated factors with the number of rehospitalizations among schizophrenic patients based on an NB model using selected variables by NB-MCP

Variable	Multivariate				Univariate
Variable	Estimate	SE	Z statistic	P-value	Estimate	SE	Z statistic	P-value
Intercept	-1.34	0.36	-3.66	< 0.001
Gender
Female (Reference category)
Male	0.43	0.23	1.81	0.07	0.42	0.18	2.27	0.022
Duration of illness (year)	0.08	0.008	9.66	< 0.001	0.08	0.008	9.76	< 0.001
Having a family history of psychiatric illness
No (Reference category)
Yes	0.35	0.15	2.38	0.017	0.47	0.16	2.97	0.002
Having a history of non-adherence to antipsychotic drugs
No (Reference category)
Yes	-0.08	0.16	-0.53	0.592	0.004	0.18	0.02	0.98
Number of children
3 < = (Reference category)
0	-0.17	0.21	-0.8	0.42	-0.41	0.22	-1.85	0.064
1–2	-0.65	0.26	-2.47	0.013	-0.86	0.28	-3	0.002
Employment status
Unemployed/Disabled/Retired (Reference category)
Employed	-0.47	0.21	-2.23	0.025	-0.29	0.21	-1.34	0.18
Housewife	-0.07	0.33	-0.23	0.813	-0.57	0.28	-2.03	0.041
The township of residence
Hamadan (Reference category)
Other Hamadan province townships	0.45	0.15	2.88	0.003	0.38	0.17	2.21	0.026
Out of Hamadan province	-0.05	0.25	-0.21	0.83	-0.07	0.26	-0.29	0.769
Having a history of arrest or prison
No (Reference category)
Yes	0.54	0.24	2.28	0.022	0.13	0.26	0.53	0.594
Having a history of substance abuse
No (Reference category)
Yes	-0.12	0.21	-0.58	0.562	-0.06	0.16	-0.35	0.719
Having a history of smoking
No (Reference category)
Yes	0.25	0.21	1.19	0.232	0.27	0.16	1.7	0.089
θ	0.99	0.15
AIC	1151
BIC	1211.33
Log-likelihood	-560.49

ISSN: 1471-2288