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. 2017 May 19;40(7):zsx085. doi: 10.1093/sleep/zsx085

Table 1.

Sociodemographic, Lifestyle, Health, and Sleep Characteristics at Baseline for the Total Study Population and for the Adults Who Were Excluded From Our Study.

Characteristics Total study population
n = 3695
Excluded adults
n = 4073*
Sociodemographic
 Female 1909 (51.7%) 2219 (54.5%)
 Age (years) 38.8 (9.6) 40.4 (10.9)
 Not married or cohabitant 534 (14.5%) 786 (19.3%)
 Level of education
  Low 2086 (56.5%) 2839 (70.3%)
  Moderate 885 (24.0%) 752 (18.6%)
  High 724 (19.6%) 450 (11.1%)
 Work status
  Employed
   White collar job 1560 (42.2%) 1082 (28.1%)
   Blue collar job 761 (20.6%) 838 (21.7%)
   Unknown job 138 (3.7%) 157 (4.1%)
  Unemployed
   Housewife/man 954 (25.8%) 1209 (31.4%)
   Other 282 (7.6%) 571 (14.7%)
Lifestyle
 Smoker 1075 (29.1%) 1733 (42.7%)
 High alcohol consumption 798 (21.6%) 881 (21.6%)
 Coffee consumer 2949 (79.8%) 3289 (81.2%)
 Occupational physical activity
  Low active 706 (19.1%) 569 (14.0%)
  Moderate active 1530 (41.4%) 1631 (40.2%)
  High active 1199 (32.5%) 1372 (33.7%)
  Not applicable 260 (7.0%) 490 (12.1%)
 Physically inactive during leisure-time 1104 (29.9%) 1396 (34.3%)
Health
 Poor self-rated health 814 (22.0%) 1176 (29.2%)
 Body mass index (kg/m2) 24.6 (3.3) 25.5 (4.0)
 Hypertension 544 (14.7%) 963 (23.6%)
 Dyslipidemia 569 (15.4%) 893 (22.0%)
 ≥1 Chronic conditions 72 (2.0%) 171 (4.2%)
Sleep
 Sleep quality
  Recent poor sleep 541 (14.6%) 748 (18.4%)
  Short sleepers 292 (7.9%) 450 (11.0%)
  Moderate sleepers 3067 (83.0%) 3087 (76.0%)
  Long sleepers 336 (9.1%) 527 (13.0%)

Frequencies (percentages) for categorical variables and mean (standard deviation) for continuous variables are presented.

*This number varies per characteristic because of missing data.