Table 3.

Correlation Analysis Results: Association of ∆temperature with ∆PVT and ∆subjective Outcome Metrics

		PVT				Subjective
		∆Number of Lapses		∆Mean 1/RT		∆Sleepiness		∆Fatigue
		r	p	r	p	r	p	r	p
∆Temperature	0:00–2:00	0.236	0.154	−0.062	0.713	0.159	0.340	−0.061	0.714
	2:00–4:00	−0.048	0.773	−0.016	0.924	0.044	0.792	−0.168	0.313
	4:00–6:00	−0.374*	0.021	0.372*	0.021	−0.174	0.297	−0.289	0.078

Notes: *p < 0.05. The magnitudes of the relative changes in the adjacent time marked as ∆subjective (∆fatigue and ∆sleepiness), ∆objective (∆number of lapses and ∆mean 1/RT), and ∆physiological (∆temperature) outcome metrics.