Comparison of morbidities between non-thyroidal illness syndrome (NTIS) and non-NTIS groups
| NTIS | Non NTIS | χ2 | p Value | |
| New York Heart Association Classification (%) | ||||
| Day 42 | ||||
| I | 30 (78.9) | 36 (90) | 1.995 | 0.369 |
| II | 5 (13.2) | 3 (7.5) | ||
| III | 3 (7.9%) | 1 (2.5) | ||
| Killips Classification (%) | ||||
| Day 1 I & II | 39 (45.9) | 40 (47) | 3.886 | 0.030* |
| III & IV | 6 (7.1) | 0 (0) | ||
| Day 5 I & II | 40 (48.8) | 40 (48.8) | 0.464 | 0.496 |
| III & IV | 2 (2.4) | 0 (0) | ||
| Arrhythmias (%) | ||||
| Day 1 | ||||
| Yes | 7 (15.6) | 2 (5) | 0.950 | 0.163 |
| No | 38 (84.4) | 38 (95) | ||
| Readmissions (%) | ||||
| Yes | 10 (22.2) | 1 (2.5) | 4.842 | 0.025* |
| No | 35 (77.8) | 39 (97.5) | ||
All tests were performed using the χ2 test for independence. p Value significant <0.05.