Table 1.
Descriptive characteristics of the study sample (n =8089)
| Variables | Statistics |
|---|---|
| Age, years, mean (SD) | 49.0 (16.8) |
| Female, N (%) | 4159 (52.0) |
| Race, N (%) | |
| NH White | 3347 (67.6) |
| NH Black | 1863 (10.9) |
| Mexican American | 964 (8.4) |
| Other | 1915 (13.1) |
| Current smoker, N (%) | 1572 (19.1) |
| Recent illness, N (%) | 1615 (19.5) |
| CVD, N (%) | 699 (7.5) |
| Cancer, N (%) | 767 (10.9) |
| Stroke, N (%) | 329 (3.2) |
| Diabetes, N (%) | 1107 (10.5) |
| Hypertension, N (%) | 3130 (35.1) |
| Physical activity, N (%) | |
| Poor | 4120 (46.6) |
| Intermediate | 1329 (17.4) |
| Ideal | 2640 (36.0) |
| BMI (kg/m2), mean (SD) | 29.2 (6.9) |
| Reference, N (%) | 2422 (29.3) |
| Overweight, N (%) | 2572 (33.1) |
| Obese, N (%) | 3019 (37.6) |
| Ratio of family income to poverty, mean (SD) | 2.9 (1.7) |
| WBC count (109 cells/L), mean (SD) | 7.1 (2.1) |
| Neutrophils (109 cells/L), mean (SD) | 4.3 (1.7) |
| Lymphocytes (109 cells/L), mean (SD) | 2.1 (0.7) |
| Platelets (109 /L), mean (SD) | 235.3 (58.7) |
| NLR, mean (SD) | 2.3 (1.2) |
| SII (109 /L), mean (SD) | 533.1 (325.4) |
| Rest-activity parameters, mean (SD) | |
| RA | 0.85 (0.12) |
| RA-Q1 | 0.66 (0.13) |
| RA-Q2 | 0.84 (0.02) |
| RA-Q3 | 0.90 (0.01) |
| RA-Q4 | 0.94 (0.01) |
| IS | 0.59 (0.14) |
| IV | 0.71 (0.23) |
| M10 | 14.4 (4.2) |
| L5 | 1.2 (1.1) |
% and means (SD) were weight adjusted. NH: Non-Hispanic; BMI, body mass index; RA, relative amplitude; IS, interdaily stability; IV, intradaily variability; M10, the average activity level of the most active continuous 10-h period; L5, the average activity level of the least active continuous 5-h period; NLR, neutrophil-lymphocyte ratio; SII, systemic immune-inflammation index