Effects of Hypoxia on Selected Psychophysiological Stress Responses of Military Aircrew

Table 2

The psychophysiological variables during the baseline and hypoxia.

							95% confidence interval
Variables	Baseline	Hypoxia	value		ES	% of change	Lower	Higher
SUDS (rank 0-100)			-7.667	≤0.001	1.05	136.2	-29.50	-17.2
RPE (rank 6-20)			-0.280	≤0.001	0.65	44.1	-5.01	-1.80
HS (kg)			0.078	0.939	-0.01	-0.2	-1.13	1.22
FVC (ml)			1.562	0.126	-0.22	-4.3	-0.59	0.46
FEV1 (ml)			2.063	.045	-0.33	-5.4	0.00	0.41
PEF (L/sec)			1.340	0.187	-0.14	-4.4	-0.21	1.04
SaO2 (%)			18.501	≤0.001	-16.5	-23.8	20.65	25.70
CFFT (Hz)			-0.762	0.450	0.22	2.2	-1.00	0.45

SUDS: Subjective Scale of Distress; RPE: rating of perceived exertion; HS: hand strength; FVC: forced vital capacity; FEV1: forced expiratory volume in one second; PEF: peak expiratory flow; SaO2: blood oxygen saturation; CFFT: critical flicker fusion threshold; ES: Cohen’s D effect size; value: Student’s -test.