Table 1

Characteristic of the study population by total sitting time, (n = 71,363)a
Total sitting time
<6 hours 6-10 hours >10 hours p-value All, complete datab All, Imputed datac
Total, n (%) 26,207 (44.6) 23,170 (39.5) 9,327 (15.9) 58,704 (82.3)
Gender, n (%)
  Men 10,103 (38.5) 9,032 (39.0) 4,404 (47.2) <0.001 28,181 (39.5) (39.5)
  Women 16,104 (61.5) 14,138 (61.0) 4,923 (52.8) 43,182 (60.5) (60.5)
Age, mean (SD) 48.8 (14.9) 46.6 (14.9) 44.7 (15.2) <0.001 48.1 (15.3) 48.1
Education, n (%)
  ≤12 years 7,923 (31.2) 5,824 (25.9) 2,237 (24.9) <0.001 15,984 (28.8) (30.0)
  13-14 years 6,194 (24.4) 5,478 (24.3) 2,289 (25.5) 13,961 (24.5) (24.4)
  ≥15 years 11,281 (44.2) 11,227 (49.8) 4,469 (49.7) 26,977 (47.4) (45.7)
Leisure time physical activity, n (%)
  High/moderate 8,069 (30.9) 6,920 (30.0) 2,415 (26.0) <0.001 17,404 (29.8) (28.8)
  Low 15,430 (59.2) 12,887 (55.8) 4,635 (49.9) 32,952 (56.3) (57.0)
  Inactive 2,587 (9.9) 3,298 (14.3) 2,246 (24.2) 8,131 (13.9) (14.2)
Daily smoking, n (%) 3,142 (12.0) 3,059 (13.2) 1,530 (16.4) <0.001 7,731 (13.2) (13.8)
Alcohol consumption (drinks/week), mean (SD) 7.5 (8.4) 8.1 (8.8) 8.8 (10.0) <0.001 8.0 (8.8) 7.9
Body Mass Index (kg/m2), mean (SD) 24.8 (4.0) 24.9 (4.2) 25.4 (4.6) <0.001 24.9 (4.2) 25.0
Hypertension, n (%) 5,009 (19.9) 4,188 (18.7) 1,644 (18.3) <0.001 10,841 (19.1) (20.4)
Diabetes, n (%) 714 (2.8) 603 (2.6) 284 (3.1) 0.080 1,983 (2.9) (2.9)

Abbreviations: SD standard deviation, n number of participants.

aSubcategories of unweighted numbers in the study population free of coronary heart disease.

bThe total number of participants varies by covariates due to differences in the number of missing observations. The shown numbers of participants represent complete available information of each covariate.

cMultiple imputation techniques used to estimate values for missing data. Shown numbers are proportions (%) for categorical variables and means for continuous variables.

Petersen et al.

Petersen et al. International Journal of Behavioral Nutrition and Physical Activity 2014 11:13   doi:10.1186/1479-5868-11-13

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