Table 3.

Averages of sleep characteristics across each assessed decade of the lifespan

	6–9.99	10–19.99	20–29.99	30–39.99	40–49.99	50–59.99	60–69.99	70–70.99	80–89.99	90–99.99
Sleep duration, hour	8.63	7.18	7.20	6.42	6.78	6.83	6.28	6.80	6.35	8.97
Number of studies	16	25	11	7	8	7	5	5	5	1
Sleep efficiency, %	84.10	87.20	87.79	77.88	86.77	85.00	74.52	85.36	86.86	89.70
Number of studies	8	12	9	3	5	2	5	8	5	1
Bedtime, hh:mm	21:34	22:35	0:23				23:03	23:24		21:34
Number of studies	9	9	4	0	0	0	1	2	0	1
Wake-up time, hh:mm	7:05	7:10	8:07				6:58			6:55
Number of studies	5	3	4	0	0	0	1	2	0	1