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Table 2 Comparison of outcomes with different models, 2017

From: Estimating length of stay and inpatient charges attributable to hospital-acquired bloodstream infections

Outcome

BSI

Model 1

Model 2

Model 3

Mean

Difference

Mean

Difference

Mean

Difference

LOS, days

34.45

9.39

25.06*

13.18

21.27*

17.59

16.86*

Total charges, USD

27,102.16

5060.43

22,041.73*

8552.69

18,549.47*

11,192.94

15,909.21*

Treatment, USD

 Treatment (no-surgery)

3119.80

357.47

2762.32*

744.72

2375.08*

1140.00

1979.80*

 Surgery

551.73

426.62

125.11*

564.72

−12.99

620.70

−68.79

 Nursing

223.48

37.14

186.34*

63.54

159.94*

96.03

127.45*

 Anesthesia

82.26

54.21

28.05*

70.68

11.58

69.87

12.39*

Laboratory & examination, USD

 Laboratory

3713.34

543.02

3170.31*

1111.61

2601.72*

1327.96

2385.37*

 Radiology

610.32

242.84

367.48*

295.55

314.76*

353.69

256.62*

Medicine & material, USD

 Western medicine

13,322.52

1573.54

11,748.98*

3477.33

9845.19*

4747.36

8575.16*

 Medical material

4629.44

1961.10

2668.34*

2404.98

2224.46*

2845.10

1784.34*

 Blood

976.72

221.17

755.54*

298.85

680.86*

547.96

428.75*

 Chinese medicine

62.44

70.36

−7.91

44.04

18.41

60.69

1.75

Bed & meal, USD

696.74

149.77

546.97*

215.15

481.59*

328.49

368.25*

Other, USD

47.94

14.63

33.31*

20.62

27.32*

25.78

22.16*

  1. Model 1, no matching; Model 2, conventional propensity score matching; Model 3, risk set matching. BSI Bloodstream infection, LOS Length of stay. T test was applied for mean cost and LOS. *P-value< 0.05