TABLE 1.

Hypoxia studies for retrospective analyses.

Study name	Sample size	Altitude (O2%) exposure minutes	Study outcomes
Study 1: Seech et al. (2020)	N = 40 male, n = 27, female, n = 13	17,500 ft (10.6%), 27-min	SpO2, HR, hypoxia-related symptoms, ERPs, VTT
Study 2: Blacker et al. (2021)	N = 29 male, n = 21
	17,500 ft (10.6%), female, n = 8	17,500 ft (10.6%), 27-min, 27-min	SpO2, HR, hypoxia-related symptoms, ERPs, VTT
Study 3: Blacker & McHail (2021)	N = 31 male, n = 17, female, n = 14	20,000 ft (9.7%), 10-min	SpO2, HR, hypoxia-related symptoms, ERPs, PVT
Study 4: Blacker & McHail (2022)	N = 34 male, n = 16, female, n = 18	20,000 ft (9.7%), 15-min	SpO2, HR, hypoxia-related symptoms, ERPs
Study 5: Unpublished data a	N = 34 male, n = 21, female, n = 13	10,000–25,000 ft (14.3–8.1%), 20-min	SpO2, HR, hypoxia-related symptoms, ERPs, HAT
Study 6: Unpublished data a	N = 21 male, n = 16, female, n = 5	20,000 ft (9.7%), 15-min	SpO2, HR, hypoxia-related symptoms, ERPs, CCT

Note. Abbreviations (SpO₂, peripheral oxygen saturation; HR, heart rate; ERPs, event-related potentials; VTT, visuomotor tracking task; PVT, psychomotor vigilance task; HAT, Hypoxia Awareness Tool [visuomotor, cognitive, and working memory tasks]; CCT, cone contrast task).

^a Studies 5 and 6 completed in 2022.