Table 2.

Comparison of year-to-year correlation and standard deviations. All models adjust for age, race, sex, and weekend nights (n=667).

	Year-to-Year Correlation	Between-subject standard deviation	Within-subject yearly standard deviation	Within-subject daily standard deviation
Time in Bed (hr)	0.67	0.74	0.52	1.31
CV		0.10	0.07	0.17
Sleep Duration (hr)	0.76	0.70	0.39	1.26
CV		0.12	0.06	0.21
Sleep Latency (min)	0.93	22.2	6.3	30.7
CV		0.98	0.28	1.36
Sleep Efficiency (%)	0.90	8.1	2.7	8.4
CV		0.10	0.03	0.10

CV – Coefficient of Variation.