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Table 1 Characteristics of participants in the Danish Work Environment Cohort Study 1990-2010

From: Temporal changes in occupational sitting time in the Danish workforce and associations with all-cause mortality: results from the Danish work environment cohort study

  1990 1995 2000 2005 2010
  n % n % n % n % n %
Total 5608 100 5238 100 5926 100 8769 100 10624 100
Age (years)           
 21–40 3078 54.9 2726 52.0 2826 47.7 3401 38.8 3410 32.1
 40–49 1570 28.0 1469 28.0 1567 26.4 2595 29.6 3323 31.1
 50–59 960 17.1 922 17.6 1274 21.5 2453 28.0 3242 30.5
 60–69 0 0 121 2.3 259 4,4 306 3.5 649 6.1
  ≥ 70 0 0 0 0 0 0 14 0.2 0 0
Gender (women) 2708 48.4 2485 47.4 2804 47.3 4462 50.9 5571 52.4
Socio-economic statusa           
 social class I (highest) 715 12.7 711 13.6 898 15.2 1537 17.5   
 social class II 1045 18.6 800 15.3 1250 21.1 2262 25.8   
 social class III 1997 35.6 1912 36.5 1762 29.7 2004 22.9   
 social class IV 555 9.9 596 11.4 705 11.9 1315 15.0   
 social class V (lowest) 1140 20.3 1041 19.9 1056 17.8 1279 14.6   
 missings 156 2.8 178 3.4 155 4.3 372 4.3   
Self-rated health           
 fair, good, or very good 5528 98.6 5157 98.5 5815 98.1 8538 97.4 9963 93.8
 very poor or poor 79 1.4 77 1.5 101 1.7 180 2.1 322 3.0
 missings 1 0.0 4 0.1 10 0.2 51 0.6 339 3.2
BMI (kg/m2)           
 normal (18.5 - < 25) 4006 71.4 3474 66.3 3520 59.4 4806 54.8 5365 50.5
 overweight (25- <30) 1317 23.5 1437 27.4 1888 31.9 2909 33.2 3640 34.3
 obese (30+) 260 4.6 290 5.5 457 7.7 901 10.3 1339 12.6
 missings 25 0.4 37 0.7 61 1.0 1.7 1.7 280 2.6
Smoking           
 never 1954 34.8 1961 37.4 2372 40.0 3807 43.4 5007 47.1
 former 1006 17.9 1078 20.6 1355 22.9 2390 27.3 3069 28.9
 current 2648 47.2 2198 42.0 2190 37.0 2515 28.7 2332 22.4
 missings 0 0 1 0.0 9 0.2 57 0.7 216 2.0
Leisure time physical activity (<2 h/wk of light intensity)a           
 No      5015 84.6 7262 82.8   
 Yes      895 15.1 1427 16.3   
 missings      16 0.3 80 0.9   
At least daily fruit or vegetable consumption           
 Yes      4326 73.0 6721 76.6 7930 74.6
 No      1588 26.5 2019 23.0 2213 20.8
 missings      12 0,2 29 0,3 481 4.5
  1. Variables without a ‘missings’ row had no missing values
  2. aIn 2010, the variable was assessed quite differently and hence excluded from the table