Table 3.
Type of MI as recorded in CPRD primary care data, for patients with a ‘gold standard’ MI subtype record in MINAP
| Subtype of MI | |||
|---|---|---|---|
| Primary care source of type of MI | STEMI (N = 315) | NSTEMI (N = 293) | |
|
Structured (Read codes) (number of patients) |
STEMI | 41 | 6 |
| NSTEMI | 6 | 96 | |
|
Free text (number of patients) |
STEMI | 13 | 5 |
| NSTEMI | 5 | 23 | |
| Patients with no information on type of MI in primary care | 250 | 163 | |
| Accuracy of MI classification using structured data | Sensitivity, % | 13.0 (9.5, 17.2) | 32.8 (27.4, 38.5) |
| Specificity, % | 98.0 (95.6, 99.2) | 98.1 (95.9, 99.3) | |
| Positive predictive value, % | 87.2 (74.3, 95.2) | 94.1 (87.6, 97.8) | |
| Accuracy of MI classification using structured and free text data | Sensitivity, % | 17.1 (13.1, 21.8) | 40.6 (34.9, 46.5) |
| Specificity, % | 96.2 (93.4, 98.1) | 96.5 (93.8, 98.2) | |
| Positive predictive value, % | 83.1 (71.7, 91.2) | 91.5 (85.4, 95.7) | |