Table 1

Sample characteristics by Physical Activity (PA) and Sitting Time (ST) Categories

Combined Categories of PA and ST


Total

Sufficient PA/Low ST

Sufficient PA/High ST

Insufficient PA/Low ST

Insufficient PA/High ST

p-value


No. (%)

2832

905(32%)

656 (23%)

702 (25%)

569 (20%)

-

Sex

< 0.001

Male

50.0%

57.5%

44.7%

50.7%

43.4%

Female

50.0%

42.5%

55.3%

49.3%

56.6%

Age group

< 0.001

30-39 years

33.6%

35.6%

27.7%

38.0%

31.6%

40-49 years

33.3%

29.8%

34.3%

36.8%

33.4%

50-59 years

33.1%

34.6%

38.0%

25.2%

35.0%

Marital status

< 0.001

Unmarried

25.5%

20.8%

31.3%

24.5%

27.6%

Married

74.5%

79.2%

68.8%

75.5%

72.4%

Educational level

< 0.001

Junior high/high school

26.4%

18.6%

33.5%

25.8%

31.5%

Two-year college

26.0%

24.7%

25.0%

25.1%

30.4%

Four-year college/graduate school

47.6%

56.7%

41.5%

49.1%

38.1%

Job status

< 0.001

Full-time job

62.0%

68.3%

53.7%

69.8%

52.2%

No full-time job

38.0%

31.7%

46.3%

30.2%

47.8%

Household income (yen p.a)

< 0.001

< 5 million

38.0%

31.3%

41.6%

36.9%

45.9%

5-10 million

46.5%

50.4%

42.8%

48.1%

42.7%

> 10 million

15.5%

18.3%

15.6%

15.0%

11.4%

BMI

0.182

Normal weight

78.2%

79.4%

79.1%

78.3%

74.9%

Overweight

21.8%

20.6%

20.9%

21.7%

25.1%

Mean BMI, kg/m2 (sd)

22.59 (3.53)

22.46 (3.25)

22.51 (3.49)

22.52 (3.50)

22.99 (4.02)


Abbreviations: PA: physical activity; ST: screen time, p.a.: per annum.

Liao et al. International Journal of Behavioral Nutrition and Physical Activity 2011 8:131   doi:10.1186/1479-5868-8-131

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