Research Article
Association of Serum Total Bilirubin Concentration with Telomere Length: The National Health and Nutrition Examination Survey
Table 1
Characteristics of the participants (
).
| | Characters | Total bilirubin, mg/dL | | Q1 () | Q2 () | Q3 () | Q4 () | Q5 () | value |
| | Age, years | | | | | | <0.001 | | Males, % | 428 (26.40) | 490 (40.50) | 815 (43.77) | 1035 (59.35) | 999 (72.34) | <0.001 | | Race, % | | | | | | <0.001 | | Non-Hispanic White | 701 (43.24) | 554 (45.79) | 958 (51.45) | 954 (54.70) | 793 (57.42) | | | Non-Hispanic Black | 349 (21.53) | 237 (19.59) | 335 (17.99) | 239 (13.70) | 171 (12.38) | | | Mexican American | 421 (25.97) | 308 (25.45) | 422 (22.66) | 422 (24.20) | 301 (21.80) | | | Other Hispanic | 106 (6.54) | 66 (5.45) | 94 (5.05) | 85 (4.87) | 66 (4.78) | | | Other | 44 (2.71) | 45 (3.72) | 53 (2.85) | 44 (2.52) | 50 (3.62) | | | Education, % | | | | | | <0.001 | | < High school | 616 (38.12) | 458 (37.88) | 625 (33.58) | 565 (32.45) | 371 (26.90) | | | High school | 367 (22.71) | 310 (25.64) | 415 (22.30) | 380 (21.83) | 340 (24.66) | | | >High school | 633 (39.17) | 441 (36.48) | 821 (44.12) | 796 (45.72) | 668 (48.44) | | | Body mass index, kg/m2 | | | | | | <0.001 | | <18.5 | 20 (1.25) | 13 (1.11) | 24 (1.35) | 25 (1.48) | 28 (2.10) | | | 18.5- <25 | 452 (28.34) | 334 (28.43) | 476 (26.76) | 555 (32.86) | 472 (35.46) | | | 25- <30 | 506 (31.72) | 403 (34.30) | 685 (38.50) | 631 (37.36) | 527 (39.59) | | | ≥30 | 617 (38.68) | 425 (36.17) | 594 (33.39) | 478 (28.30) | 304 (22.84) | | | Cigarette smoker, % | | | | | | <0.001 | | None | 861 (53.18) | 587 (48.55) | 945 (50.86) | 906 (52.07) | 711 (51.63) | | | Past | 379 (23.41) | 329 (27.21) | 480 (25.83) | 489 (28.10) | 422 (30.65) | | | Current | 379 (23.41) | 293 (24.23) | 433 (23.30) | 345 (19.83) | 244 (17.72) | | | Physical activity, MET/week | | | | | | <0.001 | | No aerobic activity | 496 (32.42) | 359 (31.55) | 497 (28.68) | 404 (25.06) | 296 (23.31) | | | Low activity | 423 (27.65) | 318 (27.94) | 475 (27.41) | 425 (26.36) | 336 (26.46) | | | Moderate activity | 247 (16.14) | 195 (17.14) | 278 (16.04) | 303 (18.80) | 214 (16.85) | | | High activity | 364 (23.79) | 266 (23.37) | 483 (27.87) | 480 (29.78) | 424 (33.39) | | | Energy intake, kcal | | | | | | <0.001 | | Alcohol use, % | 350 (22.52) | 298 (25.56) | 373 (20.85) | 508 (30.20) | 423 (32.12) | <0.001 | | Diabetes, % | 174 (10.83) | 178 (14.87) | 213 (11.56) | 169 (9.77) | 136 (9.91) | <0.001 | | No | 1433 (89.17) | 1019 (85.13) | 1629 (88.44) | 1561 (90.23) | 1236 (90.09) | | | Yes | 174 (10.83) | 178 (14.87) | 213 (11.56) | 169 (9.77) | 136 (9.91) | | | Hypertension, % | | | | | | 0.023 | | No | 1124 (69.38) | 800 (66.45) | 1261 (67.98) | 1214 (70.21) | 985 (71.95) | | | Yes | 496 (30.62) | 404 (33.55) | 594 (32.02) | 515 (29.79) | 384 (28.05) | | | C-reactive protein | | | | | | <0.001 | | Q1 | 339 (20.91) | 334 (27.60) | 541 (29.05) | 663 (38.02) | 671 (48.59) | | | Q2 | 525 (32.39) | 391 (32.31) | 650 (34.91) | 599 (34.35) | 462 (33.45) | | | Q3 | 757 (46.70) | 485 (40.08) | 671 (36.04) | 482 (27.64) | 248 (17.96) | | | Telomere length, T/S ratio | | | | | 1 | 0.006 |
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