Table 1.
Basal and clinical characteristics, according to iron and ferritin tertiles
| Basal characteristics | Population n = 280 | 1st iron tertile (≤ 40 mcg/dL) | 2nd iron tertile (> 40 or ≤ 67 mcg/dL) | 3rd iron tertile (> 67 mcg/dL) | p value | 1st ferritin tertile (≤ 110 ng/mL) | 2nd ferritin tertile (>110 or ≤ 219 ng/mL) | 3rd ferritin tertile (> 219 ng/mL) | p value |
|---|---|---|---|---|---|---|---|---|---|
| Age, years | 68 ± 13 | 69 ± 15 | 69 ± 12 | 67 ± 13 | < 0.001 | 73 ± 12 | 66 ± 14 | 67 ± 13 | 0.001 |
| Male gender | 204 (73) | 63 (23) | 73 (26) | 68 (24) | 0.12 | 53 (19) | 68 (24) | 78 (28) | 0.12 |
| Personal history | |||||||||
| SAH | 186 (66.4) | 56 (20) | 70 (25) | 60 (21) | 0.12 | 69 (25) | 58 (21) | 57 (20) | 0.12 |
| Diabetes mellitus | 90 (32) | 36 (13) | 30 (11) | 24 (9) | 0.21 | 32 (11.4) | 32 (11.4) | 26 (9.3) | 0.69 |
| Dyslipidemia | 140 (50) | 37 (13) | 59 (21) | 44 (16) | 0.87 | 46 (16) | 49 (18) | 43 (15) | 0.34 |
| History of AMI | 44 (16) | 10 (3.6) | 18 (6.4) | 16 (6) | 0.21 | 18 (6.4) | 15 (5.3) | 11 (4) | 0.42 |
| History of HF | 9 (3.2) | 2 (0.7) | 5 (1.8) | 2 (0.7) | 0.34 | 2 (0.7) | 3 (1.1) | 4 (1.4) | 0.68 |
| Renal failure | 21 (8) | 8 (3) | 7 (2.5) | 6 (2) | 0.8 | 9 (3.2) | 6 (2) | 6 (2) | 0.6 |
| PAD | 11 (4) | 3 (1) | 3 (1) | 5 (1.8) | 0.7 | 8 (3) | 3 (1) | 0 | 0.7 |
| ACS type | |||||||||
| Unstable angina | 12 (4.3) | 3 (1) | 2 (0.7) | 7 (2.5) | 0.21 | 7 (2.5) | 3 (1) | 2 (0.7) | 0.85 |
| STEMI | 125 (45) | 50 (18) | 43 (15.3) | 32 (11) | 35 (13) | 41 (15) | 45 (16) | ||
| NSTEMI | 122 (44) | 36 (13) | 41 (15) | 45 (16) | 41 (15) | 40 (14) | 40 (14) | ||
| Undetermined AMI | 21 (8) | 6 (2.1) | 6 (2.1) | 9 (3.2) | 9 (3.2) | 10 (4) | 2 (0.7) |
Results expressed as n (%) or mean ± median. SAH: systemic arterial hypertension; AMI: acute myocardial infarction; HF: heart failure; PAD: peripheral arterial disease; ACS: acute coronary syndrome; STEMI: ST-segment elevation myocardial infarction; NSTEMI: Non-ST-segment elevation myocardial infarction.