Table 2 Questionnaire-related outcomes.

From: Investigation of time profile of FEV1 across the onset of potential COPD: a retrospective cohort study using medical checkup data in Japan

 

Rapid decliners

Slow decliners

Sustainers

N

241

332

721

Sleep duration in the past month, n (%), h

*

  

 Missing

91 (37.8)

110 (33.1)

130 (18.0)

 < 5 h

10 (4.1)

10 (3.0)

26 (3.6)

 > 5–< 6 h

61 (25.3)

67 (20.2)

221 (30.7)

 > 6– < 7 h

58 (24.1)

99 (29.8)

231 (32.0)

 > 7 h

21 (8.7)

46 (13.9)

113 (15. 7)

Amount of alcohol consumed per day, L, mean (SD)

1.2 (1.1)*

1.2 (1.2)

1.0 (1.0)

Eating breakfast every day, n (%)

*

*

 

 Missing

95 (39.4)

117 (35.2)

139 (19.3)

 Always

106 (44.0)

168 (50.6)

438 (60.7)

 Often

14 (5.8)

25 (7.5)

79 (11.0)

 Sometimes

17 (7.1)

10 (3.0)

43 (6.0)

 Rarely

9 (3.7)

12 (3.6)

22 (3.1)

Walking time during commuting, min, mean (SD)

15.7 (18.5)

16.0 (17.7)

17.3 (19.9)

Degree of physical activity at work, n (%)

*

  

 Missing

49 (20.3)

94 (28.3)

189 (26.2)

 Sedentary work

86 (35.7)

120 (36.1)

306 (42.4)

 Standing (light)

29 (12.0)

32 (9.6)

67 (9.3)

 Walking (medium)

61 (25.3)

61 (18.4)

120 (16.6)

 Heavy work

16 (6.6)

25 (7.5)

39 (5.4)

Regular exercise, n (%)

*

122 (36.74)*

162 (22.46)

 Missing

1 (0.4)

 

0

 Yes

152 (63.1)

 

559 (77.5)

 No

88 (36.5)

 

162 (22.5)

  1. *Statistically significant difference vs sustainers at < 0.05.
  2. N subjects, SD standard deviation.