Table 2. Univariate logistic regression analysis results.

	Cardiology department				Orthopedics department
	OR	95% CI		p	OR	95% CI		p
		Lower	Upper			Lower	Upper
Gender—male	0.868	0.532	1.416	0.572	1.382	0.949	2.013	0.092
Age	0.743	0.593	0.931	0.010	0.940	0.925	0.956	0.000
Marital Status–married	3.896	0.474	32.052	0.206	0.457	0.268	0.779	0.004
Hukou–non-Shanghai	2.320	1.404	3.833	0.001	4.094	2.704	6.198	0.000
Employment–employed	0.918	0.492	1.713	0.788	2.145	1.422	3.235	0.000
Employment–retired	1.195	0.650	2.198	0.566	0.308	0.204	0.465	0.000
Payment method–self-pay	2.431	1.544	3.828	0.000	2.901	1.969	4.276	0.000
Day of admission—holiday	1.198	0.710	2.021	0.499	0.850	0.552	1.308	0.460
Admission time– 08:00–11:59	2.182	1.387	3.434	0.001	0.855	0.580	1.259	0.427
Admission time– 12:00–17:59	0.880	0.553	1.402	0.592	2.736	1.861	4.024	0.000
Admission route–outpatient	5.784	3.469	9.646	0.000	4.793	3.156	7.279	0.000
Admission route–emergency	0.176	0.106	0.292	0.000	0.208	0.137	0.317	0.000
Readmission–yes	2.352	1.440	3.841	0.001	1.714	1.146	2.561	0.009
Service type–medical	0.538	0.806	3.637	0.162	0.366	0.409	1.176	0.174
CCI–CCI = 0	1.258	0.765	2.069	0.366	2.330	1.588	3.418	0.000
CCI–CCI = 1	0.836	0.532	1.314	0.438	0.903	0.611	1.336	0.610
CCI–CCI = 2	1.097	0.830	1.450	0.514	0.161	0.063	0.415	0.000