Table 1.
Baseline characteristics by tertiles of total lean body mass
| Characteristics | Overall |
Tertile 1 |
Tertile 2 |
Tertile 3 |
P-value | ||||
|---|---|---|---|---|---|---|---|---|---|
| Demographics | n | % | n | % | n | % | n | % | |
| Age, mean (SD) | 63.3 (7.4) | 64.8 (7.4) | 63.5 (7.3) | 61.6 (7.0) | <0.001 | ||||
| Ethnicity | <0.001 | ||||||||
| White | 6828 | 77.3 | 2469 | 83.0 | 2372 | 80.9 | 1987 | 67.9 | |
| African American | 1292 | 14.6 | 186 | 6.3 | 350 | 11.9 | 756 | 25.8 | |
| Hispanic | 513 | 5.8 | 231 | 7.8 | 156 | 5.3 | 126 | 4.3 | |
| Other/unknown | 199 | 2.3 | 90 | 3.0 | 53 | 1.8 | 56 | 1.9 | |
| Income | <0.001 | ||||||||
| <$20 000 | 2212 | 25.0 | 693 | 23.3 | 689 | 23.5 | 830 | 28.4 | |
| $20 000–$49 999 | 3820 | 43.3 | 1305 | 43.9 | 1286 | 43.9 | 1229 | 42.0 | |
| $50 000–$74 999 | 1276 | 14.4 | 443 | 14.9 | 424 | 14.5 | 409 | 14.0 | |
| ≥$75 000 | 910 | 10.3 | 314 | 10.6 | 336 | 11.5 | 260 | 8.9 | |
| Education | 0.261 | ||||||||
| ≤High school/GED | 2769 | 31.4 | 930 | 31.3 | 882 | 30.1 | 957 | 32.7 | |
| Some college | 3308 | 37.5 | 1130 | 38.0 | 1111 | 37.9 | 1067 | 36.5 | |
| ≥College degree | 2755 | 31.2 | 916 | 30.8 | 938 | 32.0 | 901 | 30.8 | |
| Medical history | |||||||||
| Hypertension | <0.001 | ||||||||
| Never treated | 4784 | 54.2 | 1800 | 60.5 | 1681 | 57.4 | 1303 | 44.5 | |
| Currently untreated | 1578 | 17.9 | 526 | 17.7 | 492 | 16.8 | 560 | 19.1 | |
| Treated | 2470 | 28.0 | 650 | 21.8 | 758 | 25.9 | 1062 | 36.3 | |
| Diabetes mellitus | 537 | 6.1 | 65 | 2.2 | 116 | 4.0 | 356 | 12.2 | <0.001 |
| Hyperlipidaemia | 1154 | 13.1 | 383 | 12.9 | 378 | 12.9 | 393 | 13.4 | 0.768 |
| Coronary artery disease | 313 | 3.5 | 86 | 2.9 | 105 | 3.6 | 122 | 4.2 | 0.029 |
| MI | 235 | 2.7 | 65 | 2.2 | 82 | 2.8 | 88 | 3.0 | 0.188 |
| CABG/PTCA | 171 | 1.9 | 49 | 1.6 | 54 | 1.8 | 68 | 2.3 | 0.437 |
| Stroke | 113 | 1.3 | 39 | 1.3 | 32 | 1.1 | 42 | 1.4 | 0.380 |
| Heart failure | 57 | 0.6 | 9 | 0.3 | 20 | 0.7 | 28 | 1.0 | 0.007 |
| Peripheral artery disease | 186 | 2.1 | 50 | 1.7 | 59 | 2.0 | 77 | 2.6 | 0.036 |
| Systolic BP, mean (SD) | 128.3 (18.3) | 127.2 (18.6) | 127.4 (18.1) | 130.2 (18.1) | <0.001 | ||||
| Diastolic BP, mean (SD) | 74.5 (9.3) | 73.3 (9.3) | 74.4 (9.2) | 75.9 (9.2) | <0.001 | ||||
| Heart rate, mean (SD) | 69.0 (9.9) | 68.7 (9.2) | 68.5 (10.0) | 69.9 (10.4) | <0.001 | ||||
| Habits | |||||||||
| Smoking | <0.001 | ||||||||
| Never | 4792 | 54.3 | 1720 | 57.8 | 1591 | 54.3 | 1481 | 50.6 | |
| Past | 3326 | 37.7 | 1023 | 34.4 | 1109 | 37.8 | 1194 | 40.8 | |
| Current | 714 | 8.1 | 233 | 7.8 | 231 | 7.9 | 250 | 8.5 | |
| Alcohol | <0.001 | ||||||||
| Never | 1494 | 16.9 | 520 | 17.5 | 477 | 16.3 | 497 | 17.0 | |
| Past | 1919 | 21.7 | 595 | 20.0 | 548 | 18.7 | 776 | 26.5 | |
| Current | 5371 | 60.8 | 1848 | 62.1 | 1888 | 64.4 | 1635 | 55.9 | |
Central fat percentage out of total body fat mass. All values represent the total and percentage of participants unless otherwise indicated. P-value is for the comparison of all subjects across central fat percentage tertiles using ANOVA.
BMI, body mass index; GED, general educational development; MI, myocardial infarction; CABG, coronary artery bypass graft; PTCA, percutaneous transluminal coronary angioplasty.