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Table 2 Explanatory variables by a multiple regression analysis to investigate the effect of obesity, comorbidity, and ISS on LOS of these patients

From: Obese patients who fall have less injury severity but a longer hospital stay than normal-weight patients

Variables

Obese

Normal

Mann–Whitney U Test P

BMI ≥ 30

25 > BMI ≥ 18.5

n(%)

n(%)

Head/Neck

48

537

0.210

  AIS 1

2(29.2)

112(20.9)

 

  AIS 2

4(8.3)

44(8.2)

 

  AIS 3

10(20.8)

104(19.4)

 

  AIS 4

15(31.3)

225(41.9)

 

  AIS 5

5(10.4)

52(9.7)

 

Face

12

154

0.550

  AIS 1

4(33.3)

71(46.1)

 

  AIS 2

8(66.7)

83(53.9)

 

Thorax

20

176

0.804

  AIS 1

4(20.0)

19(10.8)

 

  AIS 2

5(25.0)

56(31.8)

 

  AIS 3

5(25.0)

77(43.8)

 

  AIS 4

6(30.0)

22(12.5)

 

  AIS 5

0(0.0)

2(1.1)

 

Abdomen

17

131

0.413

  AIS 1

4(23.5)

6(4.6)

 

  AIS 2

7(41.2)

83(63.4)

 

  AIS 3

6(35.3)

40(30.5)

 

  AIS 4

0(0.0)

2(1.5)

 

Extremity

217

1792

0.073

  AIS 1

9(4.2)

43(2.4)

 

  AIS 2

86(39.6)

633(35.3)

 

  AIS 3

121(55.8)

1114(62.2)

 

  AIS 4

0(0.0)

2(0.1)

 

  AIS 5

1(0.5)

0(0.0)