Table 1.

Baseline characteristics of the study population (N=16 893)

Reported variable	All	Diabetes		Sleep quality			Sleep duration
		No	Yes	Good	Common	Poor	≤6 h	6–8 h	≥8 h
n	16 893	15 939	954	4791	10 835	1267	3269	10 441	3183
Age (years), mean±SD	45.1±14.4	44.9±14.7	48.6±13.2	42.9±15.7	46.3±16.5	49.9±12.3	48.7±15.9	44.1±16.7	41.8±14.6
Sex (% male)	45.6	45.7	43.4	44.8	48.9	48.1	44.2	48.9	48.9
Occupation
Manual	13 140	12 466	674	3974	8218	948	2352	8757	2031
Non-manual	1025	982	43	221	724	80	245	468	312
Unemployed	1066	1019	47	157	783	126	217	342	507
Retired	1662	1482	190	439	1110	113	455	876	331
Education
Below high school	7164	6650	514	2157	4566	441	1386	4427	1351
High school	8617	8215	402	2555	5430	632	1663	5325	1629
Above high school	1112	1074	38	259	659	194	220	689	203
Smoker	3165	2970	195	986	1926	253	594	1957	614
Alcohol use	3081	2896	185	910	1935	236	477	1986	618
Regular exercise	5240	4965	275	1743	3212	305	974	3532	734
Family history of diabetes	912	899	13	271	595	46	166	587	159
BMI, mean±SD	23.4±4.7	23.1±5.8	25.7±4.4	23.1±4.6	23.6±4.9	22.5±6.1	24.4±4.2	23.5±4.5	23.7±5.4
Obesity (%) (BMI ≥28)	1033	838	194	292	640	101	286	425	322
Hypertension	2671	1469	1202	531	737	206	498	1640	533
Diabetes	954	∕	∕	228	578	148	234	528	192
Sleep duration
≤6 h	3269	3009	234	356	2043	870	N/A	N/A	N/A
6–8 h	10 441	9847	528	2638	7485	318	N/A	N/A	N/A
≥8 h	3183	2977	192	1797	1307	79	N/A	N/A	N/A
Sleep quality
Good	4791	4563	228	N/A	N/A	N/A	356	2638	1797
Common	10 835	10 257	578	N/A	N/A	N/A	2043	7485	1307
Poor	1267	1119	148	N/A	N/A	N/A	870	318	79

Values are numbers of subjects unless otherwisse indicated.