TABLE 2.
Descriptive information of physiological, ERPs, cognitive performance, and self-reported hypoxia-related symptom outcomes by sex.
| Total N = 116 | Male n = 78 | Female n = 38 | |
|---|---|---|---|
| M±SD | |||
| SpO2 absolute change (%) a | −30.15 ± 6.17 | −29.57 ± 5.99 | −31.37 ± 6.47 |
| HR absolute change (bpm) | 28.53 ± 14.48 | 28.11 ± 14.43 | 29.42 ± 14.79 |
| ERPs relative change (%) b | −11.92 ± 87.82 | −19.38 ± 90.33 | −3.02 ± 82.02 |
| Cognitive performance relative change (%) c | 2.03 ± 15.62 | 3.05 ± 16.48 | −0.01 ± 13.80 |
| Hypoxia-related symptom frequency score (n) | 3.51 ± 2.60 | 3.32 ± 5.51 | 3.89 ± 3.04 |
| n (%) | |||
| Hypoxia-related symptom | |||
| Tingling | 40 (35) | 30 (39) | 10 (26) |
| Hot flashes | 26 (22) | 16 (21) | 10 (26) |
| Dizziness | 36 (31) | 20 (26) | 16 (42) |
| Tunnel vision | 41 (35) | 26 (33) | 15 (40) |
| Light dimming | 26 (22) | 18 (23) | 8 (21) |
| Euphoria | 13 (11) | 10 (13) | 3 (3) |
| Loss of coordination | 23 (20) | 15 (19) | 8 (21) |
| Headache | 24 (21) | 12 (15) | 12 (32) |
| Fatigue | 60 (52) | 40 (51) | 20 (53) |
| Breathlessness | 40 (35) | 24 (31) | 16 (42) |
| Blurred vision | 40 (35) | 26 (33) | 14 (37) |
| Nausea | 17 (15) | 11 (14) | 6 (16) |
| Apprehension | 22 (19) | 12 (15) | 10 (26) |
Note. Abbreviations (M±SD, mean ± standard deviation; SpO, peripheral capillary oxygen saturation; HR, heart rate; ERPs, event-related potentials). All percentages rounded to the nearest whole number. Each n (%) self-reported as “yes.”
a
SpO2 missing one participant, n = 115.
b
ERPs, eight participants missing, n = 108.
c
Cognitive performance, n = 90; 12 participants did not perform cognitive performance tasks as part of the study, 14 participants missing.