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Table 1 Sample Size a and baseline characteristics of the study population by daily sitting time

From: Association of daily sitting time and coffee consumption with the risk of all-cause and cardiovascular disease mortality among US adults

Variable

Daily sitting time

Total

<4 h

4 to 6 h

6 to 8 h

>8 h

Age, y

47.1 (0.3)

45.4 (0.4)

47.9 (0.5)

47.7 (0. 6)

47.4 (0.4)

Sex

     

Female

5316 (50.0)

1468 (49.1)

1288 (51.6)

827 (50.5)

1733 (49.3)

Male

5323 (50.0)

1477 (50.9)

1290 (48.4)

848 (49.5)

1708 (50.7)

Race and ethnicity

     

Hispanic

2693 (25.3)

1099 (21.8)

676 (14.2)

336 (10.4)

582 (8.5)

Non-Hispanic White

4786 (45.0)

1069 (60.7)

1134 (67.7)

836 (72.8)

1747 (74.6)

Non-Hispanic Black

2023 (19.0)

517 (10.9)

518 (11.0)

302 (9.4)

686 (10.0)

Other b

1137 (10.7)

260 (6.6)

250 (7.1)

201 (7.4)

426 (6.9)

Educational attainment

     

< High school

2378 (22.4)

959 (22.3)

616 (15.9)

312 (13.3)

491 (9.6)

High school

2410 (22.7)

733 (28.1)

621 (24.7)

392 (22.7)

664 (17.6)

> High school

5851 (55.0)

1253 (49.6)

1341 (59.4)

971 (64.0)

2286 (72.8)

Marital status

     

Married

5571 (52.4)

1543 (55.4)

1364 (57,0)

869 (54.3)

1795 (56.4)

Never married

1908 (17.9)

476 (16.8)

450 (17.6)

325 (20.9)

657 (18.5)

Divorced

1175 (11.0)

321 (10.2)

273 (9.5)

166 (9.1)

415 (11.4)

other

1985 (18.7)

605 (17.6)

491 (15.9)

315 (15.7)

574 (13.7)

HEI-2015 c

50.43 (0.3)

50.60 (0.4)

49.69 (0.4)

50.12 (0.5)

50.95 (0.4)

Family poverty income ratio

     

<1.3

3223 (30.3)

1111 (28.0)

810 (21.9)

495 (20.1)

807 (15.3)

1.3–3.5

4061 (38.2)

1204 (40.5)

1037 (39.1)

620 (36.2)

1200 (31.2)

≥3.5

3355 (31.5)

630 (31.5)

731 (39.1)

560 (43.8)

1434 (53.5)

BMI, kg/m2

     

<25

3037 (28.6)

890 (33.1)

753 (30.7)

482 (29.1)

912 (27.1)

25-29.9

3554 (33.4)

1059 (34.7)

893 (33.8)

519 (31.3)

1083 (32.4)

≥30

4048 (38.1)

996 (32.2)

932 (35.4)

674 (39.6)

1446 (40.5)

Waist circumference

99.44 (0.3)

96.88 (0.4)

98.68 (0.5)

100.28 (0.6)

101.25 (0.5)

Abdominal obesity d

     

Yes

6077 (57.1)

1554 (50.0)

1466 (57.2)

979 (58.3)

2078 (60.0)

Alcohol use

     

Never

1369 (12.9)

453 (12.0)

312 (10.0)

220 (10.3)

384 (8.8)

Former

1623 (15.3)

435 (12.0)

423 (13.7)

269 (12.9)

496 (11.3)

Mild

3789 (35.6)

913 (33.0)

918 (38.5)

622 (39.4)

1336 (41.6)

Moderate

1664 (15.6)

432 (16.0)

387 (16.8)

241 (16.3)

604 (20.4)

Heavy

2194 (20.6)

712 (27.0)

538 (21.0)

323 (21.1)

621 (17.9)

Smoking status

     

Never

5886 (55.3)

1690 (54.7)

1394 (55.1)

904 (54.5)

1898 (57.2)

Former

2646 (24.9)

668 (24.7)

638 (23.0)

434 (26.6)

906 (27.0)

Now

2107 (19.8)

587 (20.6)

546 (21.8)

337 (18.9)

637 (15.8)

Diabetes

     

Yes

1474 (13.9)

389 (8.4)

346 (9.8)

226 (9. 9)

513 (11.4)

Hypertension

     

Yes

5585 (52.5)

1448 (44.0)

1381 (49.8)

906 (48.6)

1850 (48.8)

Cardiovascular disease

     

Yes

1138 (10.7)

255 (7.0)

254 (8.2)

208 (10.0)

421 (9.3)

Hypercholesterolemia

     

Yes

1304 (12.3)

376 (12.4)

353 (14.7)

202 (11.9)

373 (11.4)

Cancer diagnosis

     

Yes

980 (9.2)

203 (7.5)

239 (9.9)

186 (10.2)

352 (10.0)

PA, min/wk

     

None (inactive)

2567 (24.1)

571 (14.9)

526 (16.6)

420 (20.5)

1050 (26.0)

0 to < 150

(insufficiently active)

1463 (13.8)

333 (10.0)

308 (11.7)

227 (12.0)

595 (17.1)

≥ 150 (active)

6609 (62.1)

2041 (75.2)

1744 (71.8)

1028 (67.5)

1796 (56.9)

Coffee consumption

     

None

5095 (47.9)

1420 (47.3)

1225 (46.6)

800 (48.2)

1650 (44.4)

Q1 f

1850 (17.4)

579 (16.4)

434 (13.9)

298 (14.2)

539 (14.1)

Q2 f

1863 (17.5)

495 (17.1)

477 (18.9)

281 (16.4)

610 (19.0)

Q3 f

1831 (17.2)

451 (19.2)

442 (20.6)

296 (21.2)

642 (22.4)

  1. Abbreviations: BMI, body mass index (calculated as weight in kilograms divided by height in meters squared); PA, physical activity; h, hours; min/wk, minutes per week; NHANES, the National Health and Nutrition Examination Survey
  2. The descriptive statistics are expressed as mean ± standard deviation and number (percentage) for continuous and categorical variables
  3. a Weighted to be nationally representative
  4. b Including American Indian/Alaska Native/Pacific Islander, Asian, and multiracial
  5. C HEI-2015 (Healthy Eating Index-2015, which is derived from a 24-hour dietary recall interview, and measures the quality of a person’s overall diet from 0 to 100 [worst to best])
  6. d Abdominal obesity, men and women were divided into two groups based on their waist circumferences (men, ≥ 120 cm; women, ≥ 88 cm)
  7. f Coffee consumption(g/day) of coffee drinkers was divided into three groups (Q1, Q2 and Q3) by quartile. Q1, Q2 and Q3 are < 326, 326–540, > 540, respectively
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