Table 1.
Descriptive statistics of study population
| N = 5513 (100%) | |
|---|---|
| Sex | |
| Male | 2023 (36.70) |
| Female | 3490 (63.30) |
| Age | |
| Mean (SD) | 51.4 (17.27) |
| < 40 | 1523 (27.63) |
| 40–50 | 1165 (21.13) |
| 50–65 | 1460 (26.48) |
| > 65 | 1365 (24.76) |
| SES | |
| Unclassified/missing | 1224 (22.20) |
| Low | 2213 (40.14) |
| High | 2076 (37.66) |
| Education | |
| Missing | 500 (9.07) |
| Low | 1505 (27.30) |
| Middle | 2203 (39.96) |
| High | 1305 (23.67) |
| Charlson comorbidity index | |
| 0 | 4630 (83.98) |
| 1 | 440 (7.98) |
| 2 | 293 (5.31) |
| 3+ | 150 (2.72) |
| Biomarkers | Mean (SD) |
|---|---|
| IgA (g/L) | 2.65 (1.39) |
| IgG (g/L) | 12.65 (3.91) |
| IgM (g/L) | 1.34 (1.03) |
| CRP (mg/L) | 6.04 (12.63) |
| Haptoglobin (g/L) | 1.14 (0.36) |
| Albumin (g/L) | 42.40 (3.23) |
| White blood cells (109 cells/L) | 6.82 (3.37) |
| Iron (µmol/L) | 16.27 (5.54) |
| Total iron-binding capacity (µmol/L) | 60.27 (8.63) |
Participants had both serum markers of the humoral immune system and inflammation measured at the same measurement
SES socioeconomic status