Table 1.

Characteristics of study participants

	Non-CMS (n = 19)	CMS (n = 17)
Age, yr	51.9 ± 2.2	44.8 ± 2.7*
BMI, kg/m2	26.1 ± 0.7	26.9 ± 0.8
Hematocrit, %	54.7 ± 0.6	68.1 ± 0.8**
CMS score	0.37 ± 0.1	7.1 ± 0.8*
$\text{S}{\text{p}}_{{\text{O}}_2}$, %	87.4 ± 0.8	83.8 ± 0.6***
HR, beats/min	65.6 ± 2.6	71.6 ± 2.1
Serum EPO, pg/dl	12.3 ± 2.9	21.6 ± 6.7
SBP, mmHg	110.6 ± 3.4	110.7 ± 1.9
DBP, mmHg	72.4 ± 3.6	72.5 ± 2.1
Serum iron, µg/dl	100.7 ± 10.9	120.3 ± 15.7
Serum ferritin, ng/ml	162.9 ± 24.2	124.6 ± 19.3
Serum transferrin saturation, %	26.4 ± 2.7	29.6 ± 3.8

Values are expressed as means ± SE; n = number of participants. BMI, body mass index; CMS, chronic mountain sickness; DBP, diastolic blood pressure; EPO, erythropoietin; HR, heart rate; SBP, systolic blood pressure; $\text{S}{\text{p}}_{{\text{O}}_2}$, pulse O₂ saturation.

^*P < 0.05;

^**P < 0.001;

^***P < 0.01.