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Table 3 The heterogeneity of the subgroup analysis of the included AMS studies

From: Sex-based differences in the prevalence of acute mountain sickness: a meta-analysis

Subgroup Subjects number AMS [n(%)] RR (95%CI) P
Women Men Women Men
All participants 2639 5030 1006(38.1) 1722(34.2) 1.24(1.09–1.41) 0.000
Race
 Aisan 2126 3718 836(39.3) 1285(34.6) 1.27(1.10–1.48) 0.000
 No-Aisan 513 1312 170(33.1) 437(33.3) 1.16(1.09–1.41) 0.005
Number of subjects
 <300 344 635 182(52.9) 222(35.0) 1.60(1.27–2.00) 0.225
  ≥ 300 2295 4385 824(35.9) 1500(34.2) 1.12(0.98–1.28) 0.001
LLSS cut-off value
  ≥ 3 2176 4002 848(39.0) 1443(36.1) 1.25(1.08–1.45) 0.000
  ≥ 4 463 1028 158(34.1) 279(27.1) 1.27(1.01–1.60) 0.168
Average age
 <40 years 1849 3544 685(37.0) 1205(34.0) 1.32(1.02–1.71) 0.000
  ≥ 40 years 790 1486 321(40.6) 517(34.8) 1.22(1.04–1.44) 0.013
  1. LLSS Lake Louise Scoring System, AMS acute mountain sickness; RR relative risk, 95% CI 95% confidence interval