Table 2.
Comparison of biological parameters during hospitalization between cases and controls.
| Variables * | Normal Range | Age < 65 (n = 316) | Age ≥ 65 (n = 316) | p-Value |
|---|---|---|---|---|
| RBC (millions/mm3) | 4.35–5.65 | 61 (19.3%) | 108 (34.2%) | <0.001 |
| WBC (thousands/mm3) | 4.5–11.0 | 72 (22.8%) | 121 (38.3%) | <0.001 |
| Hemoglobin (g/dL) | 13.0–17.0 | 54 (17.1%) | 83 (26.3%) | 0.005 |
| Hematocrit (%) | 36–48 | 39 (12.3%) | 67 (21.2%) | 0.002 |
| Platelets (thousands/mm3) | 150–450 | 41 (13.0%) | 53 (16.8%) | 0.179 |
| Ferritin (ng/mL) | 20–250 | 48 (15.2%) | 66 (20.9%) | 0.062 |
| ESR (mm/h) | 0–22 | 124 (39.2%) | 149 (47.2%) | 0.044 |
| CRP (mg/L) | 0–10 | 145 (45.9%) | 166 (52.5%) | 0.094 |
| Fibrinogen (g/L) | 2–4 | 169 (53.5%) | 180 (57.0%) | 0.378 |
| Procalcitonin (ug/L) | 0–0.25 | 53 (16.8%) | 92 (29.1%) | <0.001 |
| D-dimers (ng/mL) | <250 | 27 (8.5%) | 44 (13.9%) | 0.032 |
| IL-6 (pg/mL) | 0–16 | 52 (16.5%) | 65 (20.6%) | 0.183 |
| Creatinine (µmol/L) | 0.74–1.35 | 30 (9.5%) | 68 (21.5%) | <0.001 |
* Data reported as % outside the normal range and calculated using Chi-square test and Fisher’s exact unless specified differently; RBC—red blood cells; WBC—white blood cells; ESR—erythrocyte sedimentation rate; CRP—C-reactive protein; IL-6—interleukin 6.