Table 2.

Correlations between significantly changed metabolites and sleep parameters.

Group	Metabolites	SE		SOL		TST
		r	p	r	p	r	p
Exercise	alpha-ketoisocaproic acid	−0.52	0.026
Diet	3-hydroxybutric acid	−0.47	0.025
	d-glucopyranose	−0.54	0.006	0.43	0.048
	Tagatose			0.51	0.016
	Oxalic acid			0.49	0.021
	4-deoxyerythronic acid			0.60	0.004
	2-keto-isovaleric acid					0.45	0.029

r: correlation coefficient; p: p value; SE: sleep efficiency; SOL: sleep onset latency; TST: total sleep time.