Table I.
Characteristics of patients with UA, DA or without anemia
| Characteristics | Whole population (n = 981) |
Unexplained anemiae (n = 48) |
Defined anemiac,d (n = 121) |
No anemia groupa,b (n = 812) |
P-value |
|---|---|---|---|---|---|
| Female, n (%) | 594 (61) | 27 (56) | 52 (63) | 504 (62) | 0.09 |
| Age, mean ± SD [years] | 70.8 ±8.45 | 75.9 ±9.2 | 74.7 ±9.3 | 69.8 ±8.0 | < 0.0001 |
| Hb, mean ± SD [g/dl] | 13.47 ±1.79 | 11.2 ±1.2 | 10.2 ±1.6 | 14.09 ±1.06 | < 0.0001 |
| WBC, mean ± SD [× 109/l] | 6.94 ±2.77 | 7.08 ±3.29 | 7.93 ±5.74 | 6.78 ±1.90 | 0.63 |
| PLT, mean ± SD [× 109/l] | 234.6 ±71.6 | 231.7 ±82.3 | 269.9 ±117.9 | 229.5 ±59.4 | 0.01 |
| eGFR, , mean ± SD [ml/min/1.73 m2] | 81.4 ±22.9 | 74.4 ±26.5 | 70.7 ±28.1 | 83.4 ±21.3 | < 0.0001 |
| CRP, mean ± SD [mg/l] | 24.3 ±51.8 | 25.7 ±80.6 | 42.9 ±60.0 | 6.2 ±14.6 | < 0.0001 |
| Number of comorbidities median (range) | 2 (0–12) | 4 (1–7) | 4 (0–9) | 2 (0–8) | < 0.0001 |
| Number of hospitalizations median (range) | 0 (0–12) | 1 (0–8) | 2 (0–12) | 0 (0–11) | < 0.0001 |
| Barthel scale, mean ± SD | 85 ±12.3 | 80 ±14.9 | 80 ±16.2 | 85 ±8.4 | < 0.0001 |
| Death, n (%) | 40 (4) | 5 (10) | 16 (13) | 19 (2) | < 0.0001 |
A significantly greater value in the NA group than the UA group and the NA group than the DA group for the following parameters: Hb, eGFR and Barthel scale scores. bA significantly lower value in the NA group than the UA group and the NA group than the DA group for the following parameters: number of hospitalizations, number of comorbidities in patients. cA significantly greater value in the DA group than the NA group for the following parameters: PLT, CRP, age and deaths. dA significantly greater value in the DA group than the UA group for the following parameters: CRP and PLT. eA significantly greater value in the UA group than the NA group for the following parameters: age and deaths. CRP – C reactive protein, DA – defined anemia, eGFR – estimated glomerular filtration rate, Hb – hemoglobin, NA – no anemia, PLT – platelet count, UA – unexplained anemia, WBC – white blood cell count. A p-value less than 0.05 was considered statistically significant.