Table 1.
Most common Read codes extracted from free text for 2000 patients within 90 days of MI in CALIBER (top five codes in each category)
| Number of records (%) | Read code | Read term |
|---|---|---|
| Current or previous condition (diagnosis Read codes) | ||
| 887 (8.1%) | G30z.00 | Acute myocardial infarction NOS |
| 443 (4.1%) | R065.00 | [D] Chest pain |
| 304 (2.8%) | C10..00 | Diabetes mellitus |
| 272 (2.5%) | G307100 | Acute non-ST segment elevation myocardial infarction |
| 256 (2.3%) | G33..00 | Angina pectoris |
| Current or previous condition (non − diagnosis Read codes) | ||
| 991 (9.5%) | 8H3Z.00 | Other hospital admission NOS |
| 913 (8.8%) | 8H…00 | Referral for further care |
| 795 (7.6%) | 1M…00 | Pain |
| 469 (4.5%) | 173..00 | Breathlessness |
| 445 (4.3%) | 8HA..11 | Discharged from follow up |
| Quantitative test result | ||
| 577 (15.8%) | 42Z7.00 | Red blood cell distribution width |
| 142 (3.9%) | 42M..00 | Lymphocyte count |
| 141 (3.9%) | 42N..00 | Monocyte count |
| 139 (3.8%) | 42K..00 | Eosinophil count |
| 138 (3.8%) | 42J..00 | Neutrophil count |
| Absence of condition (diagnosis Read codes) | ||
| 121 (7.8%) | R023.00 | [D] Oedema |
| 105 (6.8%) | G33..00 | Angina pectoris |
| 90 (5.8%) | R065.00 | [D] Chest pain |
| 57 (3.7%) | A....00 | Infectious and parasitic diseases |
| 38 (2.5%) | R006200 | [D] Fever NOS |
| Absence of condition (non-diagnosis Read codes) | ||
| 281 (15.6%) | 182..00 | Chest pain |
| 274 (15.2%) | 173..00 | Breathlessness |
| 208 (11.5%) | 1M…00 | Pain |
| 89 (4.9%) | 2I18.12 | O/E - tenderness |
| 48 (2.7%) | 199..00 | Vomiting |
| Suspected condition (diagnosis Read codes) | ||
| 70 (8.2%) | G30z.00 | Acute myocardial infarction NOS |
| 48 (5.6%) | K190.00 | Urinary tract infection, site not specified |
| 40 (4.7%) | A….00 | Infectious and parasitic diseases |
| 32 (3.8%) | G33..00 | Angina pectoris |
| 23 (2.7%) | G581.13 | Impaired left ventricular function |
| Suspected condition (non-diagnosis Read codes) | ||
| 44 (16.5%) | 8H…00 | Referral for further care |
| 18 (6.7%) | 8H3Z.00 | Other hospital admission NOS |
| 16 (6.0%) | 1M…00 | Pain |
| 9 (3.4%) | 173..00 | Breathlessness |
| 7 (2.6%) | 2C2..11 | O/E - anaemic |