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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