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Table 2 Baseline characteristics

From: Rhodiola crenulata extract for prevention of acute mountain sickness: a randomized, double-blind, placebo-controlled, crossover trial

Treatment sequences
Characteristic Rhodiola– placebo Placebo – Rhodiola P value
  (N = 48) (N = 54)  
Male 23 (47.9) 27 (50.0) 0.83
Age, y 35.8 ± 10.0 36.3 ± 10.4 0.84
BMI, kg/m2 22.6 ± 2.9 23.4 ± 3.0 0.17
SpO2*, % 98.8 ± 0.9 98.9 ± 1.0 0.60
Heart rate, beats/min 72.5 ± 8.9 72.2 ± 9.6 0.89
Altitude of residence, m 151.7 ± 105.9 152.7 ± 105.9 0.94
History of mountaineering above 3000 m    0.18
 Never 23 (47.9) 36 (66.7)  
 <10 mountains 20 (41.7) 16 (29.6)  
 >10 mountains 5 (10.4) 2 (3.7)  
History of AMS 7 (14.6) 5 (9.3) 0.54
  1. Continuous variables are presented as mean ± standard deviation, and categorical variables are presented as count (percentage).
  2. BMI, Body mass index.
  3. *SpO2, Oxygen saturation by pulse oximetry at an altitude of 250 m. Heart rate and other demographics were measured during the participant conference before randomization.
  4. AMS, Acute mountain sickness.