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. 2011 Jun 4;2011:936298. doi: 10.4061/2011/936298

Table 3.

Sleep, wakes, and naps in categories (N = 110).

N (%) Mean (SD) Range
Sleep (hours) (Minutes) (Minutes)
 Less than 6 23 (21) 266 93.5 25.7–355.7
 6–8 hours 55 (50) 431 32.8 361.0–478.3
 More than 8 32 (29) 534 38.8 480.3–609.0

Wakes (numbers) (Numbers) (Numbers)
 Less than 9 25 (23) 6 (1.9) 3–8.7
 9–16 59 (54) 13 (2.3) 9–16.7
 17 and more 26 (24) 21 (5.4) 17–40.3

Nap (minutes) (Minutes) (Minutes)
 0 4 (3.6) 0 (0.0) 0
 1–30 33 (30.0) 15 (8.4) 4–29.5
 31–60 18 (16.4) 47 (7.3) 33–60
 61–90 16 (14.5) 78 (9.1) 61.5–90
 91–120 17 (15.5) 103 (9.1) 91–118.5
 121–150 5 (4.5) 134 (8.1) 122–143
 151–more 17 (15.5) 255 (85.6) 154–389.5