Table 1.
Patient characteristics
| Characteristics | N | Analysis population (N = 888) |
|---|---|---|
| Age, years, mean (SD) | 888 | 85.2 (5.6) |
| Women, n (%) | 888 | 564 (63.5) |
| Admission to geriatric unit, n (%) | ||
| Hospitalized | 888 | 463 (52.1) |
| Outpatients | 888 | 425 (47.9) |
| Body mass index, kg/m2 | ||
| Mean (SD) | 860 | 25.8 (5.1) |
| Classes, n (%) | ||
| < 18.5 (underweight) | 860 | 42 (4.9) |
| 18.5–25 (normal) | 860 | 374 (43.5) |
| 25–30 (overweight) | 860 | 278 (32.3) |
| ≥ 30 (obesity) | 860 | 166 (19.3) |
| ≥ 1 comorbidity, n (%) | 888 | 828 (93.2) |
| Arterial hypertension | 888 | 599 (67.5) |
| Diabetes | 888 | 191 (21.5) |
| Heart failure | 888 | 189 (21.3) |
| Ischemic heart disease | 888 | 173 (19.5) |
| Chronic kidney disease | 888 | 166 (18.7) |
| Cancer | 888 | 89 (10.0) |
| At least one treatment of ID or anemia, n (%) | 888 | 142 (16.0) |
| Folic acid (ongoing at inclusion) | 888 | 69 (7.8) |
| Vitamin B12 (ongoing at inclusion) | 888 | 27 (3.0) |
| Oral iron (ongoing at inclusion) | 888 | 39 (4.4) |
| Transfusion (within 3 months) | 888 | 41 (4.6) |
| Intravenous iron (within 3 months) | 888 | 23 (2.6) |
| ESA (within 3 months) | 888 | 8 (0.9) |
| ≥ 1 treatment with an impact on ID or anemia, n (%) | 888 | 655 (73.8) |
| Anticoagulant | 888 | 374 (42.1) |
| Proton pump inhibitor | 888 | 303 (34.1) |
| Platelet antiaggregant | 888 | 234 (26.4) |
| Other | 888 | 28 (3.2) |
| Biological parameters, mean (SD) | ||
| Serum ferritin, µg/L | 872 | 262.5 (302.9) |
| Transferrin saturation (TSAT), % | 852 | 23.9 (14.0) |
| Hb, g/dL | 874 | 12.2 (1.9) |
| C-reactive protein, mg/L | 869 | 24.4 (44.9) |
| Serum creatinine, µmol/L | 879 | 92.6 (57.6) |
| Glomerular filtration rate,a mL/min/1.73 m2 | 878 | 62.7 (20.1) |
| Serum albumin, g/L | 853 | |
| Mean (SD) | 35.9 (6.1) | |
| > 54 | 0 | |
| [34–54]b | 560 (65.7) | |
| < 34 | 293 (34.3) | |
| Serum potassium, mmol/L | 874 | |
| Mean (SD) | 4.13 (0.47) | |
| > 5.5 | 5 (0.6) | |
| [3.5–5.5]b | 810 (92.7) | |
| < 3.5 | 59 (6.8) | |
ESA erythropoiesis stimulating-agent, Hb hemoglobin, ID iron deficiency
aCalculated with CKD-EPI formula
bNormal range