TABLE 3.

Statistical analysis of the circadian period of WT and dexras1^−/− mice before and after late-night/early-morning RF under DD (Experiment 5).

RF-naíve*	WT (n = 7)	dexras1−/− (n = 7)	F value	p value
Period in week 1 of DD (τ1) [h]	23.76 ± .01	23.67 ± .10	F(1,13) = .7	.43
Period in week 3 of DD (τ3) [h]	23.78 ± .01	23.71 ± .12	F(1,13) = .4	.56
Δτ1 (τ3 − τ1) [h]	.03 ± .01	.04 ± .04	F(1,13)= .1	.78
Period in week 5 of DD (τ5) [h]	23.77 ± .02	23.71 ± .08	F(1,13)= .1	.79
Δτ2 (τ5 − τ1) [h]	.01 ± .01	.08 ± .03	F(1,13) = 3.2	.10
Night-time RF	WT (n = 6)	dexras1−/− (n = 6)	F value	p value
Period before RF (τpre) [h]	23.66 ± .07	23.76 ± .10	F(1,10)= .6	.47
Period in week 2 post-RF (τpo1) [h]	23.62 ± .04	23.95 ± .08	F(1,10) = 12.7	5.1e-3
Δτ3 (τpo1 − τpre) [h]	−.04 ± .06	.19 ± .04	F(1,10) = 8.8	.01
Period in week 4 post-RF (τpo2) [h]	23.63 ± .05	24.14 ± .11	F(1,10) = 16.6	2.2e-3
Δτ4 (τpo2 − τpre) [h]	−.02 ± .06	.38 ± .07	F(1,10) = 19.0	1.4e-3

Data are mean ± SEM.

^*A separate cohort of age-matched mice was maintained on ad libitum feeding under DD for 5 weeks for τ measurements.