Table 3.

Peak time and change in peak time of clock gene expression in all participants and each chronotype.

		All	Morningness	Intermediate	Eveningness
NR1D1	Friday	7.03 ± 1.22	5.50 ± 0.91	8.50 ± 2.72	7.50 ± 2.38
	Monday	8.67 ± 1.27	5.00 ± 1.00	10.50 ± 1.92	10.50 ± 2.87
	Δ	4.50 ± 0.84	1.50 ± 0.73	5.00 ± 1.81	7.00 ± 1.00*
NR1D2	Friday	9.00 ± 1.06	5.50 ± 0.50	10.00 ± 1.69	11.50 ± 2.26
	Monday	8.00 ± 1.05	5.50 ± 0.91	7.50 ± 0.73	11.00 ± 2.70
	Δ	2.67 ± 0.67	1.00 ± 0.65	4.50 ± 1.40	2.50 ± 1.05
PER3	Friday	8.17 ± 0.90	6.00 ± 0.01	8.50 ± 1.05	8.50 ± 1.99
	Monday	8.83 ± 1.04	6.00 ± 0.76	5.50 ± 1.30	12.00 ± 2.51*
	Δ	3.67 ± 0.76	1.00 ± 0.65	1.41 ± 0.25	4.50 ± 1.40*

All data are presented as means ± SE. Δ = average of individual changes from Friday to Monday trials.

P value: Bonferroni test; among groups, *P < 0.05 vs Morningness group.