Table 2.
Most commonly used definitions of iron deficiency in patients with pulmonary hypertension
| ID definitions | Serum ferritin (µg/L) | TSAT (%) | sTFR (mg/L) | sTFRF index |
|---|---|---|---|---|
| ID 1 | < 30 | < 16 | – | – |
| ID 2 | < 100 | < 20 | – | – |
| ID 3 | <100 | – | – | |
| or 100–299 | If < 20 | |||
| ID 4 | – | – |
> 4.5 (female) > 5.0 (male) |
– |
| ID 5 | – | – | – |
> 3.2 if CRP < 0.5 mg/dL > 2.0 if CRP > 0.5 mg/dL |
ID iron deficiency, TSAT transferrin saturation, CRP C-reactive protein, sTFR soluble transferrin receptor, sTFRF index soluble transferrin receptor/log serum ferritin index; for a detailed evaluation of this topic refer to [27]