Patients were screened for anemia (< 12.0 g/dL in women and < 13.0 g/dL in men) and ID (either absolute [ferritin < 30 μg/L] or functional [ferritin ≥ 30 μg/L + transferrin saturation < 20% + C-reactive protein > 5 mg/L]). Here, CRP is linked to anemia.