Table 3.

Sleep data for baseline and test nights in Val/Val and Met carriers (mean ± SD)

(min)	Baseline night		Test night		Statistics for allelic group difference
	Val/Val (n = 14)	Met carriers (n = 15)	Val/Val (n = 14)	Met carriers (n = 15)
Stage 2 duration	179.1 ± 27.9	188.4 ± 34.7	187.7 ± 25.4	179.8 ± 36.8	F(1,21) = 0.00, p = 0.96
Stage 3 duration	169.3 ± 34	164.7 ± 45.4	161 ± 15.4	167.8 ± 41	F(1,21) = 0.15, p = 0.71
REM duration	98.3 ± 21.3	103.3 ± 22.6	102.2 ± 28.9	119.7 ± 14.7	F(1,21) = 2.53, p = 0.13
Stage 2 latency	8.9 ± 6.3	12.4 ± 11.5	12.4 ± 11.2	12.3 ± 10.4	F(1,27) = 0.32, p = 0.58
Stage 3 latency	15.3 ± 7.3	19.5 ± 13.6	15.9 ± 11.5	17.4 ± 10.6	F(1,27) = 0.73, p = 0.40
REM latency	117.8 ± 54.9	95 ± 13.6	85.1 ± 24.8	88.8 ± 38.3	F(1,27) = 0.60, p = 0.43
Total time in bed	494.5 ± 13.6	497.1 ± 12.7	503.3 ± 5.7	505.3 ± 10.1	F(1,27) = 0.18, p = 0.68
Sleep duration	446.7 ± 31	456.4 ± 22.7	451 ± 38.2	467.3 ± 23.1	F(1,21) = 3.11, p = 0.09
First NREM period
Stage 2 duration	15 ± 15	15.4 ± 11.3	9.6 ± 5.0	9.7 ± 4.6	F(1,27) = 0.00, p = 0.95
Stage 3 duration	57.5 ± 15.1	51.5 ± 16.4	56.7 ± 15.0	48.2 ± 10.4	F(1,27) = 3.73, p = 0.06
Total period duration	81.9 ± 33.6	69.4 ± 17.5	67.2 ± 17.3	58.4 ± 10.9	F(1,27) = 2.61, p = 0.12
Q1
Stage 2 duration	6.6 ± 3.9	6.2 ± 2.7	5 ± 1.7	5.7 ± 1.7	F(1,27) = 0.08, p = 0.78
Stage 3 duration	11.7 ± 6.3	10.9 ± 5.2	11.9 ± 4.1	9.2 ± 5.1	F(1,27) = 1.45, p = 0.24
Total period duration	21.9 ± 8.7	17.5 ± 4.3	16.9 ± 4.3	15.2 ± 4.5	F(1,27) = 3.13, p = 0.09