Table 2. Variables related to acute coronary syndrome severity.
| Characteristics | AHI ≤ 15 events/h, n = 156 | AHI > 15 events/h, n = 373 | P value |
| NSTEMI | 61 (39.1%) | 122 (32.7%) | 0.159 |
| UA | 87 (55.8%) | 219 (58.7%) | 0.532 |
| Length of hospitalization, days | 6.7 ± 4.2 | 8.0 ± 5.6 | 0.007 |
| Ejection fraction | 63.8 ± 6.8 | 61.8 ± 8.3 | 0.009 |
| BNP, pg/mL | 60.3 ± 139.0 | 90.8 ± 240.1 | 0.068 |
| cTnI, ng/mL | 0.9 ± 8.3 | 1.5 ± 9.7 | 0.534 |
| HSCRP, mg/L | 5.4 ± 7.9 | 5.3 ± 8.8 | 0.905 |
| MACE | 5 (3.2%) | 32 (8.6%) | 0.027 |
| Death | 0 | 10 (2.7%) | 0.039 |
| MI | 3 (1.9%) | 4 (1.1%) | 0.435 |
| Unplanned revascularization | 2 (1.3%) | 18 (4.8%) | 0.051 |
Data are presented as mean ± SD or n (%). Mann–Whitney and Chi-squared tests were used to assess the differences in the means or proportions between groups. Statistically significant P-values are shown in bold. AHI: apnea–hypopnea index; BNP: B-type natriuretic peptide; cTnI: cardiac troponin I; HSCRP: hypersensitive C reactive protein; MACE: major adverse cardiovascular events; MI: myocardial infarction; NSTEMI: Non ST elevation myocardial infarction; UA: unstable angina.