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Table 2 Meta-regression results of 17 studies

From: Association between acute mountain sickness (AMS) and age: a meta-analysis

Heterogeneous

factors

Coefficient

Standard error

Z

P value

M1

M2

M3

M4

M1

M2

M3

M4

M1

M2

M3

M4

M1

M2

M3

M4

Altitude

0.0001

−0.0007

0.0001

0.0004

0.0003

0.0004

0.0005

0.0005

− 0.16

− 0.74

0.16

0.79

0.872

0.082

0.872

0.427

Sample size

0

−0.0014

0.0001

−0.0015

0.0005

0.0007

0.0005

0.0007

−0.04

−2.12

0.05

−2.27

0.968

0.034

0.963

0.023

Race

2.1531

3.4527

2.0841

3.4422

0.6841

0.8154

0.7018

0.8154

3.15

4.23

2.97

4.22

0.002

0

0.003

0

Age

–

0.0662

–

0.0785

–

0.0226

–

0.0240

–

2.93

–

3.27

–

0.003

–

0.001

Ascend mode

–

–

−0.1131

−0.4124

–

–

0.2558

0.2717

–

–

−0.44

−1.52

–

–

0.658

0.05

Constant

−1.8892

−1.2281

−2.3158

−2.6617

1.5536

1.5699

1.8291

1.8321

−1.22

−0.78

− 1.27

− 1.45

0.224

0.434

0.205

0.146

  1. Race assignment: 1 means Asian, 0 means non-Asian; Ascend mode assignment: 1 means < 1 days to reach; 0 means ≥1 days to reach; AMS Acute mountain sickness. -: No data