Table 4.

Estimated length of stay with 95% confidence intervals by patient characteristics

	Model 1		Model 2
	β (95% CI)	P value	β (95% CI)	P value
Sex
Male	1.00		–	–
Female	1.02 (0.97–1.07)	0.515	–	–
Age group
18–34 years	0.79 (0.51–1.22)	0.284	0.77 (0.51–1.19)	0.243
35–44 years	0.80 (0.66–0.99)	0.036	0.80 (0.65–0.98)	0.034
45–54 years	0.84 (0.75–0.95)	0.004	0.83 (0.74–0.93)	0.001
55–64 years	0.85 (0.78–0.94)	0.002	0.85 (0.77–0.93)	0.001
65–74 years	0.90 (0.82–1.00)	0.039	0.89 (0.81–0.98)	0.020
75–84 years	0.92 (0.83–1.01)	0.070	0.90 (0.82–0.99)	0.025
≥ 85 years	1.00		1.00
Stroke type
Ischemic stroke	1.00		1.00
Hemorrhagic stroke	1.19 (1.04–1.36)	0.012	1.18 (1.03–1.35)	0.019
Comorbidity category
None	1.00		1.00
Moderate	1.06 (1.00–1.12)	0.055	1.06 (1.00–1.12)	0.070
Severe	1.12 (1.02–1.24)	0.018	1.14 (1.01–1.23)	0.027
Very severe	1.09 (0.99–1.20)	0.058	1.13 (1.03–1.23)	0.013
Admission year
2010	1.20 (1.04–1.37)	0.011	1.20 (1.04–1.38)	0.010
2011	1.18 (1.04–1.34)	0.012	1.18 (1.04–1.34)	0.013
2012	1.16 (1.03–1.31)	0.016	1.15 (1.02–1.30)	0.026
2013	1.14 (1.01–1.29)	0.038	1.13 (1.00–1.27)	0.055
2014	1.07 (0.94–1.22)	0.307	1.07 (0.94–1.22)	0.315
2015	1.02 (0.95–1.23)	0.258	1.06 (0.93–1.21)	0.347
2016	1.01 (0.90–1.15)	0.793	1.02 (0.90–1.15)	0.816
2017	1.00 (0.87–1.13)	0.916	1.00 (0.88–1.14)	0.968
2018	1.03 (0.91–1.16)	0.667	1.02 (0.90–1.16)	0.745
2019	0.97 (0.86–1.10)	0.658	0.97 (0.86–1.10)	0.634
2020	1.00		1.00
Payer, N (%)
Urban employee basic medical	1.01 (0.92–1.10)	0.890	–	–
Urban residence basic medical insurance	0.94 (0.84–1.06)	0.372	–	–
Self-pay	1.00		–	–
Season, N (%)
Spring	1.05 (0.97–1.13)	0.235	–	–
Summer	1.04 (0.97–1.12)	0.303	–	–
Fall	1.05 (0.97–1.13)	0.232	–	–
Winter	1.00		–	–
Week, N (%)
Weekend	0.97 (0.91–1.03)	0.272	–	–
Weekday	1.00		–	–

Model 1: unadjusted length of stay; Model 2: length of stay after adjusting age, sex, stroke types, calendar year, comorbidity categories