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Table 5 Multivariate logistic regression to determine relationship between risk factors and AMS prevalence

From: Population level determinants of acute mountain sickness among young men: a retrospective study

Indicators

 

Odd years

(n = 1769)

 

Even years

(n = 1958)

 

β

AOR

95%CI

p-value

β

AOR

95%CI

p-value

Demographic indicators

        

   Ethnicity

        

Han (Chinese) (ref.)

 

1.00

   

1.00

  

Tibetan

-3.39

0.03

0.01-0.25

0.001

-2.55

0.08

0.02-0.33

0.001

Hui

-0.29

0.75

0.43-1.31

0.309

0.06

1.06

0.66-1.69

0.810

   Birth province

        

Northwest province (ref.)

 

1.00

   

1.00

  

Southwest province

-0.04

0.96

0.75-1.24

0.758

0.18

1.19

0.94-1.51

0.149

East province

0.33

1.39

1.07-1.81

0.015

0.28

1.32

1.02-1.70

0.034

Health behavior

        

   Prophylaxis

        

No (ref.)

 

1.00

   

1.00

  

Yes

-0.29

0.75

0.60-0.93

0.008

-0.28

0.76

0.60-0.94

0.014

Travel indicators

        

   Start point altitude

        

1300-1500 m (ref.)

 

1.00

   

1.00

  

900-1100 m

0.21

1.23

0.94-1.62

0.136

0.19

1.20

0.94-1.54

0.135

600-800 m

0.36

1.44

1.11-1.85

0.005

0.28

1.32

1.03-1.68

0.026

   Destination altitude

        

2900-3100 m (ref.)

 

1.00

   

1.00

  

3600-3700 m

1.00

2.71

2.03-3.62

< 0.001

1.01

2.74

2.11-3.56

< 0.001

4100-4300 m

1.42

4.12

3.10-5.46

< 0.001

1.37

3.94

3.04-5.11

< 0.001

   Deployment type

        

Normal by land (ref.)

 

1.00

   

1.00

  

Emergency by land

0.75

2.11

1.65-2.70

< 0.001

0.73

2.08

1.64-2.64

< 0.001

Normal by air

0.69

2.00

1.44-2.76

< 0.001

0.79

2.20

1.62-2.98

< 0.001

Emergency by air

0.88

2.40

1.66-3.46

< 0.001

1.21

3.34

2.41-4.65

< 0.001

   Travel season

        

Warm (ref.)

 

1.00

   

1.00

  

Cold

0.25

1.28

1.04-1.59

0.022

0.22

1.25

1.02-1.53

0.034