Table 1.

Socio-demographic correlates of eating or drinking prior to bedtime, sleep duration and wake after sleep onset (WASO) among 124 239 participants of the American time use survey

(Numbers and percentages; mean values and standard deviations)

Socio-demographic predictors	n	%	Ate < 1 h before bed, (%)*,†	Mean sleep duration (h)	se	Wake after sleep onset (%)*,†
Gender
Women	70 125	53	5·5	8·1	0·008	2·3
Men	54 114	47	7·5	7·9	0·009	1·4
Age group, years (y)
15–22	10 358	12	9·0	8·7	0·022	1·1
23–30	12 908	12	7·9	8·2	0·018	2·2
31–50	48 343	35	6·9	7·8	0·009	1·9
51–64	27 730	23	5·7	7·8	0·012	1·8
65+	24 900	18	3·9	8·2	0·013	2·1
Race/ethnicity
White, non-Hispanic	85 187	69	5·4	7·9	0·007	1·9
Black, non-Hispanic	16 070	12	7·4	7·9	0·019	2·5
Hispanic	16 704	14	9·6	8·3	0·017	1·3
Other‡	6278	5	8·6	8·0	0·026	1·5
Educational status
Less than high school	19 308	17	8·4	8·5	0·016	1·6
High school graduate	53 893	45	6·3	8·0	0·009	1·8
College graduate	38 350	29	5·6	7·8	0·009	2·0
Master’s degree or higher	12 688	9	5·8	7·7	0·015	1·9
Work status
Employed	76 627	62	7·3	7·8	0·007	1·6
Unemployed	5719	5	6·7	8·5	0·030	1·5
Not in labour force	41 893	33	4·8	8·3	0·011	2·3
Cohabitation
Spouse present	62 863	55	5·9	7·9	0·007	2·1
Unmarried partner present	4041	4	8·4	8·1	0·032	1·4
No spouse or unmarried
Partner present	57 335	41	6·9	8·2	0·010	1·6
Presence of children < 18 years
Yes	54 274	40	7·1	8·0	0·009	2·1
No	69 965	60	6·0	8·0	0·008	1·6

^*Weighted means and proportions for percentage of respondents who reported WASO ≥ 30 min.

^†All bivariate associations are statistically significant, P < 0·05.

^‡Other: Asian only, Hawaiian/Pacific Islander only or bi-racial.