TABLE 1.
Description of subject characteristics for the whole population.
| Median [IQR] or n (%) | |
| Age (years) | 32 [23; 39] |
| Sex | |
| Female | 235 (14.7) |
| Male | 1,359 (85.3) |
| Ethnic group | |
| Aymara | 75 (4.7) |
| Quechua | 1,519 (95.3) |
| Residency in La Rinconada (years) | 3 [2; 5] |
| Hematocrit (%) | 60 [54; 66] |
| Heart rate (bpm) | 87 [75; 94] |
| SpO2 (%) | 82 [78; 85] |
| Diastolic blood pressure (mm Hg) | 70 [70; 80] |
| Systolic blood pressure (mm Hg) | 100 [100; 110] |
| Classification 1 (excessive erythrocytosis, international consensus) | |
| No excessive erythrocytosis | 891 (55.9) |
| Excessive erythrocytosis | 703 (44.1) |
| Classification 2 (excessive erythrocytosis, calculated threshold) | |
| No excessive erythrocytosis | 1,381 (86.6) |
| Excessive erythrocytosis | 213 (13.4) |
| Classification 3 (total CMS score, international consensus) | |
| ≤5 (no CMS) | 1,373 (86.1) |
| 6–10 (mild total CMS score) | 156 (9.8) |
| 11–14 (moderate total CMS score) | 52 (3.3) |
| >14 (severe total CMS score) | 13 (0.8) |
CMS, chronic mountain sickness; IQR, interquartile range; SpO2, pulse oxygen saturation. Classifications 1 and 3 were performed according to the current international consensus on CMS (Leon-Velarde et al., 2005), while Classification 2 was performed based on a calculated threshold for excessive erythrocytosis in the population from La Rinconada (see section “Materials and Methods” for further details).