Sex Differences in Sleep Duration among Older Adults with Self-Reported Diagnosis of Arthritis: National Health and Nutrition Examination Survey, 2009-2012

Table 1

Sample characteristics according to self-reported diagnosis of arthritis, = 4,888, ages 50 years and above, from National Health and Nutrition Examination Survey, 2009-2012.

Category	Total		Total				-value	Female ()				-value	Male ()				value
			Arthritis		no Arthritis			Arthritis		no Arthritis			Arthritis		no Arthritis
		wt		wt		wt			wt		wt			wt		wt
Sex
Female	2455	52.9	1260	47.6	1195	52.4	<.0001
Male	2433	47.1	872	34.8	1561	65.2
Race/Ethnicity
NHW	2281	76.7	1092	42.2	1189	57.8	0.0013	621	47.7	518	52.3	.0848	471	36.1	671	63.9	.0115
NHB	1134	9.9	514	44.8	620	55.2		299	51.9	270	48.1		215	36.0	350	64.0
Mex-Am	584	4.2	214	35.6	370	64.4		139	46.8	145	53.2		75	25.6	225	74.4
Other	889	9.2	312	35.3	577	64.7		201	42.4	262	57.6		111	27.1	315	72.9
Age (years)
50-59	1590	42.3	518	32.3	1072	67.7	<.0001	310	37.3	475	62.7	<.0001	208	27.2	597	72.8	<.0001
60 and above	3298	57.7	1614	48.4	1684	51.6		950	54.4	720	45.6		664	41.0	964	59.0
Education
≤HS graduate	2593	42.2	1185	44.5	1408	55.5	.0044	721	52.4	586	47.6	.0143	464	35.4	822	64.6	.7210
>HS	2295	57.8	947	39.4	1348	60.6		539	44.0	609	56.0		408	34.3	739	65.7
Smoking
Current	792	15.3	337	42.2	455	57.8	.0012	173	56.6	126	43.4	.0055	164	31.9	329	68.1	<.0001
Former	1681	35.0	810	46.2	871	53.8		371	51.2	277	48.8		439	42.1	594	57.9
Never	2415	49.7	985	38.1	1430	61.9		716	43.9	792	56.1		269	28.6	638	71.4
Body Mass Index
0-24	1213	25.4	441	37.3	772	62.7	<.0001	270	41.3	345	58.7	<.0001	171	31.6	427	68.4	.0002
25-29	1733	36.1	680	36.6	1053	63.3		354	42.6	407	57.4		326	31.2	646	68.8
30 and above	1942	38.6	1011	49.0	931	51.0		636	56.1	443	43.9		375	40.5	488	59.5
Hours of sleep
2-5	800	12.7	402	49.8	398	50.2	.0004	238	57.0	170	43.0	.0192	164	41.9	228	58.1	.0231
6-7	2339	51.4	980	40.0	1359	60.0		579	45.9	598	54.1		401	33.9	761	66.1
8-9	1598	33.6	671	39.9	927	60.0		399	45.9	398	54.1		272	32.3	529	67.7
10 and above	151	2.4	79	53.9	72	46.1		44	56.8	29	43.2		35	50.0	43	50.0
Insurance
Yes	4171	89.1	1924	43.0	2247	57.0	.0002	1131	48.1	986	51.9	.2814	793	37.0	1261	63.0	<.0001
No	717	10.9	208	29.7	509	70.3		129	42.1	209	57.9		79	19.2	300	80.8
Perceived Health Status
Excellent/v good	1572	42.6	543	31.4	1029	68.6	<.0001	307	35.7	470	64.3	<.0001	236	26.2	559	73.8	<.0001
Good	1884	37.4	820	45.5	1064	54.5		488	52.5	459	47.5		332	38.2	605	61.8
Fair/Poor	1432	29.0	769	55.8	663	44.2		465	65.0	266	35.0		304	45.6	397	54.4

Hours of sleep were 2 to less than 5.5, 5.5 to less than 7.5, 7.5 to less than 9.5, and 9.5 and above. Age was 50 to less than 60 and 60/above. Body mass index was 0 to less than 25, 25 to less than 30, and 30/above. wt, weighted; NHW, non-Hispanic White; NHB, non-Hispanic Black; Mex-Am, Mexican-American; ≤, less than or equal to; HS, high school; >, greater than; and v, very.