Table 2 Hierarchical regression among number of risk factors for stroke, LOS, and inpatient costs

Independent variable

Number of risk factors

0.24(0.18,0.30)^***

1.06(0.62,1.49)^***

0.16(0.11,0.22)^***

Mediator

LOS

0.07(0.06,0.08)^***

Covariates

Stroke subtypes

(ref: Ischaemic stroke)

 Haemorrhagic stroke

0.37(0.24,0.49)^***

2.07(1.21,2.94)^***

0.22(0.11,0.33)^***

Sex (ref: Male)

 Female

0.23(0.10,0.35)^**

-0.32(-1.22,0.58)

0.25(0.14,0.36)^***

Age (ref: <50) (years)

 50–59

0.06(-0.13,0.26)

0.31(-1.06,1.69)

0.04(-0.13,0.21)

 60–69

0.05(-0.15,0.24)

-0.83(-2.20,0.55)

010(-0.07,0.27)

 70–79

-0.02(-0.22,0.18)

-0.35(-1.76,1.06)

0.01(-0.17,0.18)

 ≥ 80

-0.12(-0.36,0.12)

0.70(-0.98,2.37)

-0.17(-0.38,0.03)

Marital Status

(ref: Single/unmarried)

 Married

-0.54(-1.20,0.12)

-5.60(-10.23, -0.97)^*

-0.14(-0.72,0.43)

BMI (ref: <18.5)(kg/m2)

 18.5–23.9

0.20(-0.21,0.61)

1.87(-1.01,4.74)

0.07(-0.28,0.42)

 24-27.9

0.09(-0.32,0.50)

1.25(-1.63,4.14)

0.00(-0.35,0.36)

 ≥ 28

-0.04(0.48,0.39)

1.67(-1.41,4.75)

-0.16(-0.54,0.22)

Medical insurance

(ref: UEBMI)

 URBMI

0.15(0.02,0.28)^*

0.50(-0.45,1.44)

0.11(-0.00,0.23)

  Full self-payment

0.04(-0.14,0.22)

0.27(-0.99,1.52)

0.02(-0.13,0.18)

 Other

0.03(-0.37,0.43)

0.30(-2.49,3.09)

0.01(-0.33,0.35)

Adj R-squared

12.74%

9.98%

34.29%