Table 4.
Baseline characteristics of COVID-19-positive population
| Symptomatic | Asymptomatic | P-value | ||
|---|---|---|---|---|
| Variables | n = 26 | n = 9 | ||
| Age, years | 72.35 ± 12.86 | 76.67 ± 13.86 | 0.40 | |
| Gender, female | 5 (19.2) | 2 (22.2) | 1.00 | |
| Dialysis vintage, months | 29 (9.75–45.75) | 21 (12.5–35.5) | 0.54 | |
| Body mass index, kg/m2 | 26 (23–28.25) | 26 (24–32) | 0.38 | |
| Charlson Comorbidity Index | 3.5 (2–6.25) | 4 (3.5–6.5) | 0.31 | |
| Co-existing conditions (%) | ||||
| Coronary artery disease | 0 (0) | 2 (22.2) | 0.06 | |
| Congestive heart disease | 7 (26.9) | 2 (22.2) | 1.00 | |
| Peripheral vascular disease | 4 (15.4) | 2 (22.2) | 0.64 | |
| Cerebrovascular disease | 4 (15.4) | 0 (0) | 0.55 | |
| Chronic pulmonary disease | 6 (23.1) | 2 (22.2) | 1.00 | |
| Diabetes | 12 (46.2) | 6 (66.7) | 0.44 | |
| Hepatic disease | 2 (7.7) | 1 (11.1) | 1.00 | |
| Treatments | ||||
| ACEI/ARB | 0 (0) | 1 (11.1) | 0.26 | |
| Calcimimetics | 4 (15.4) | 1 (11.1) | 1.00 | |
| Vitamin D | 13 (50) | 5 (55.6) | 1.00 | |
| NSAIDs | 6 (23.1) | 5 (55.6) | 0.10 | |
| Corticoids | 5 (19.2) | 2 (22.2) | 1.00 | |
| Statins | 12 (46.2) | 5 (55.6) | 0.71 | |
| Body composition | ||||
| AvROH (%) | 12.27 ± 9.09 | 13.51 ± 16.02 | 0.78 | |
| Lean Tissue Index, kg/m2 | 12.38 ± 3.27 | 12.63 ± 3.3 | 0.84 | |
| Fat Tissue Index, kg/m2 | 12.55 ± 4.26 | 14.77 ± 7.06 | 0.27 | |
| Laboratory values | ||||
| Na+, mmol/L | 135.23 ± 3.57 | 136.78 ± 2.33 | 0.24 | |
| K+, mmol/L | 5.1 ± 0.73 | 4.9 ± 0.6 | 0.45 | |
| Leucocytes, no./mm3 | 6600 (5300–8625) | 6100 (4500–8400) | 0.47 | |
| Lymphocytes, no./mm3 | 1057.15 (555.35–1467.18) | 992.2 (857.2–1697) | 0.54 | |
| Haemoglobin, g/dL | 11.18 ± 1.52 | 10.91 ± 0.86 | 0.62 | |
| 25-hydroxyvitamin D, ng/mL | 23.43 ± 10.55 | 23.99 ± 12.21 | 0.90 | |
| Ferritin, µg/L | 324.5 (164.75–449.75) | 377 (288.5–590.5) | 0.34 | |
| C-reactive protein, mg/L | 6.52 (2.73–14.92) | 8.35 (1.66–14.58) | 0.99 | |
| Albumin, g/dL | 4.05 (3.6–4.3) | 3.8 (3.55–4) | 0.18 | |
| Alanine aminotransferase, UI/mL | 15 (10–21) | 13 (10.5–20.5) | 0.81 | |
| Dialysis parameters | ||||
| Pre-dialysis systolic blood pressure, mmHg | 142.08 ± 17.76 | 140.56 ± 13.33 | 0.82 | |
| Online haemodiafiltration (%) | 24 (92.3) | 9 (100) | 1.00 | |
| Kt/V | 1.71 (1.55–1.99) | 1.62 (1.42–1.87) | 0.32 | |
Baseline characteristics: last available data before PCR performance. All laboratory parameters correspond to the previous month measurement, excepting 25-hydroxyvitamin D (6 months). Values are represented as mean ± SD, medians with interquartile range (25th–75th percentile) or n (%).