Table 2.

Sample characteristics for the analytic sample and stratified by shorter mean weekday sleep duration

Mean weekday sleep duration based on actigraphy	Total sample analyzeda (n = 240)	Sample according to mean weekday sleep durationb		P Value
		< 8 h (n = 159)	≥ 8 (n = 81)
Duration, h	7.55 ± 1.14	6.91 ± 0.69	8.83 ± 0.67	NA
Duration category, h
< 6.5	38 (15.8)	38 (100)	0 (0)	NA
6.5 to < 7	47 (19.6)	47 (100)	0 (0)
7 to < 8	74 (30.8)	74 (100)	0 (0)
8 to < 8.5	33 (13.8)	0 (0)	33 (100)
≥ 8.5	48 (20.0)	0 (0)	48 (100)
Nutrition Measures
Total energy, kcal	1917 (1573, 2403)	1968 (1618, 2461)	1723 (1409, 2150)	0.009
Percentage of calories from
Fat	35.0 ± 6.9	35.9 ± 6.7	33.2 ± 6.9	0.004
Carbohydrates	50.8 ± 8.4	49.6 ± 8.2	53.3 ± 8.3	0.001
Protein	15.1 ± 3.6	15.4 ± 3.6	14.6 ± 3.7	0.13
Calories consumed from snacks			0.04
Highest quintile	51 (21.3)	40 (78.4)	11 (21.6)
Other quintiles	189 (78.7)	119 (63.0)	70 (37.0)

Data are shown as mean ± SD or number (%), except total energy, which is shown as is median (interquartile range).

^aColumn percentages shown;

^bRow percentages shown;

^cThe highest quintile included snacks comprising ≥ 475 kcal.