Appendix Table 1.
Comparison of sampled patients with records obtained and abstracted vs. patients whose records were unable to be obtained/abstracted.
| Characteristic | Patients whose records were not obtained by vendor | Patients whose records were obtained | P-Value for difference |
|---|---|---|---|
| n | 115 | 185 | |
| Age (mean, SD) | 71.3 (12.7) | 74.1 (11.3) | 0.096 |
| Age>65y (n, %) | 87 (75.7) | 150 (81.1) | 0.262 |
| Female (n, %) | 43 (37.4) | 70 (37.8) | 0.938 |
| Census regions (n, %) | |||
| Northeast | 15 (13.0) | 31 (16.8) | 0.385 |
| South | 39 (33.9) | 58 (31.4) | 0.645 |
| Midwest | 29 (25.2) | 60 (32.4) | 0.183 |
| West | 32 (27.8) | 36 (19.5) | 0.092 |
| Unknown | 0 (0) | 0 (0) | – |
| Inclusion criteria (n, %): | |||
| History of AMI | 84 (73.0) | 146 (78.9) | 0.242 |
| History of PCI | 67 (58.3) | 113 (61.1) | 0.628 |
| History of CABG | 36 (31.3) | 73 (39.5) | 0.153 |
| History of CAD | 109 (94.8) | 176 (95.1) | 0.892 |
| Enrichment factors (n, %): | |||
| Presence of diabetes | 55 (47.8) | 93 (50.3) | 0.681 |
| Presence of cerebrovascular disease | 53 (46.1) | 96 (51.9) | 0.328 |
| Presence of peripheral artery disease | 34 (29.6) | 75 (40.5) | 0.055 |
| Left ventricular ejection fraction < 50% | 17 (14.8) | 39 (21.1) | 0.173 |
| Creatinine > 1.5 mg/dL | 1 (0.9) | 2 (1.1) | 0.858 |
| systolic or diastolic heart failure | 44 (38.3) | 87 (47.0) | 0.137 |
| LDL cholesterol > 130 mg/dL | 3 (2.6) | 8 (4.3) | 0.442 |
SD = standard deviation; AMI = acute myocardial infarction; PCI = percutaneous coronary intervention; CABG = coronary artery bypass graft; CAD = coronary artery disease; LDL = low-density lipoprotein.