Table 1 Demographic characteristics according to quartiles of physical activity.

From: Independent effect of physical activity and resting heart rate on the incidence of atrial fibrillation in the general population

 

Physical activity (METs/day)

Total

Q1

Q2

Q3

Q4

p-value

19.5 (11.3, 35.6)

<11.3

11.3–19.4

19.5–35.5

≥35.6

n = 8,811

n = 2,230

n = 2,047

n = 2,251

n = 2,283

Age (years)

50 (44, 60)

49 (44, 59)

48 (43, 57)†

49 (44, 58)

56 (48, 63)†

<0.001

Sex

     

<0.001

   Male

4,235

1,072 (25.3%)

920 (21.7%)

1,068 (25.2%)

1,175 (27.8%)

 

   Female

4,576

1,158 (25.3%)

1,127 (24.6%)

1,183 (25.9%)

1,108 (24.2%)

 

Residence

     

<0.001

   Urban

4,317

1,229 (28.5%)

1,468 (34.0%)

1,378 (31.9%)

242 (5.6%)

 

   Rural

4,494

1,001 (22.3%)

579 (12.9%)

873 (19.4%)

2,041 (45.4%)

 

Education

     

<0.001

   ≤Elementary school

2,958

673 (22.8%)

475 (16.0%)

599 (20.3%)

1,211 (40.9%)

 

   Middle/high school

4,666

1,199 (25.7%)

1,182 (25.3%)

1,314 (28.2%)

971 (20.8%)

 

   College/university

1,187

358 (30.2%)

390 (32.9%)

338 (28.5%)

101 (8.4%)

 

Follow-up duration (months)

139 (97, 141)

139 (95, 141)

139 (97, 142)†

139 (108, 141)

139 (98, 142)†

0.002

Occupation

     

<0.001

   Housewife

2,453

728 (29.7%)

711 (29.0%)

742 (30.2%)

272 (11.1%)

 

   Office work

391

123 (31.5%)

151 (38.6%)

98 (25.1%)

19 (4.8%)

 

   Agriculture

2,486

343 (13.8%)

175 (7.0%)

410 (16.5%)

1,558 (62.7%)

 

   Self-employment

1,250

349 (27.9%)

403 (32.2%)

381 (30.5%)

117 (9.4%)

 

   Sales

110

29 (26.4%)

42 (38.2%)

28 (25.4%)

11 (10.0%)

 

   Factory production

470

114 (24.3%)

125 (26.6%)

138 (29.4%)

93 (19.7%)

 

   Professional work

357

106 (29.7%)

101 (28.3%)

109 (30.5%)

41 (11.5%)

 

   Others

1,258

415 (33.0%)

336 (26.7%)

343 (27.3%)

164 (13.0%)

 
  1. Data shown with percentages in parentheses represent numbers of participants, and data shown with two numbers in parentheses represent median values with interquartile ranges in parentheses.
  2. †p < 0.01 vs. Q1. Kruskal-Wallis test (Dunn’s post hoc).
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