Table 1 The study participants' baseline demographic and socioeconomic characteristics by screen time exposures
From: Stationary screen time, blood lipids, and atherosclerotic cardiovascular disease incidence
Covariates | Screen time, hours | P-value | |||
|---|---|---|---|---|---|
Quartile 1 (0–1.4) | Quartile 2: 1.5–2 | Quartile 3: 2–3 | Quartile 4:  > 3 | ||
Age (years), n(%) |  |  |  |  |  < 0.001 |
 15–40 | 327 (18.3) | 451 (21.3) | 336 (22.9) | 565 (32.3) |  |
 41–50 | 399 (22.3) | 510 (24.1) | 375 (25.6) | 408 (23.3) |  |
 51–60 | 461 (25.8) | 612 (28.9) | 381 (26.0) | 420 (24.0) |  |
 > 60 | 601 (33.6) | 547 (25.8) | 373 (25.5) | 358 (20.4) |  |
Gender, n(%) |  |  |  |  |  < 0.001 |
 Male | 765 (42.8) | 951 (44.9) | 689 (47.0) | 902 (51.5) |  |
 Female | 1023 (57.2) | 1169 (55.1) | 776 (53.0) | 849 (48.5) |  |
Marital status, n(%) |  |  |  |  |  < 0.001 |
 Unmarried | 38 (2.1) | 45 (2.1) | 41 (2.8) | 172 (9.8) |  |
 Married/lived with partner | 1513 (84.6) | 1917 (90.4) | 1312 (89.6) | 1445 (82.5) |  |
 Divorce/widowhood/separation | 237 (13.3) | 158 (7.5) | 112 (7.6) | 134 (7.7) |  |
Education, n(%) |  |  |  |  |  < 0.001 |
 Illiterate | 624 (34.9) | 486 (22.9) | 326 (22.3) | 261 (14.9) |  |
 Primary school | 398 (22.3) | 519 (24.5) | 296 (20.2) | 254 (14.5) |  |
 Low middle school | 541 (30.3) | 759 (35.8) | 505 (34.5) | 547 (31.2) |  |
 Upper middle school to university | 225 (12.6) | 356 (16.8) | 338 (23.1) | 689 (39.3) |  |
Residence, n(%) |  |  |  |  |  < 0.001 |
 Urban areas | 466 (26.1) | 548 (25.8) | 452 (30.9) | 754 (43.1) |  |
 Rural areas | 1322 (73.9) | 1572 (74.2) | 1013 (69.1) | 997 (56.9) |  |
BMI, n(%) | Â | Â | Â | Â | 0.214 |
 Underweight: < 18.5 | 123 (6.9) | 130 (6.1) | 68 (4.6) | 105 (6.0) |  |
 Normal:18.5–23.9 | 963 (53.9) | 1103 (52.0) | 781 (53.3) | 906 (51.7) |  |
 Overweight:24–27.9 | 535 (29.9) | 690 (32.5) | 463 (31.6) | 569 (32.5) |  |
 Obesity: > = 28 | 167 (9.3) | 197 (9.3) | 153 (10.4) | 171 (9.8) |  |
Smoking status, n(%) | Â | Â | Â | Â | 0.001 |
 Never | 1265 (70.7) | 1499 (70.7) | 1010 (68.9) | 1143 (65.3) |  |
 Ever or now | 523 (29.3) | 621 (29.3) | 455 (31.1) | 608 (34.7) |  |
Alcohol consumption, n(%) |  |  |  |  |  < 0.001 |
 Never | 1282 (71.7) | 1467 (69.2) | 995 (67.9) | 1078 (61.6) |  |
 1–2 times a Month | 150 (8.4) | 218 (10.3) | 151 (10.3) | 258 (14.7) |  |
 1–4 times a Week | 169 (9.4) | 227 (10.7) | 176 (12.0) | 263 (15.0) |  |
 Almost every day | 187 (10.5) | 208 (9.8) | 143 (9.8) | 152 (8.7) |  |
Daily outdoor physical activity duration, n(%) |  |  |  |  |  < 0.001 |
 Never | 1682 (94.1) | 1975 (93.2) | 1332 (90.9) | 1491 (85.2) |  |
 0–30 | 71 (4.0) | 93 (4.4) | 92 (6.3) | 178 (10.2) |  |
 > 30 | 35 (2.0) | 52 (2.5) | 41 (2.8) | 82 (4.7) |  |