| ICPC-2 codes in letters of referral for chest X-ray | Codes recorded, n | Proportion of total ICPC-2 codes, % | ICD-10 codes in the regional healthcare database | Codes recorded, n | Proportion of total ICD-10 codes, % |
|---|---|---|---|---|---|
| A23 Risk factor NOS | 70 | 17.5 | F17 Mental and behavioural disorders due to use of tobacco Z72 Problems related to lifestyle | 13 | 1.4 |
| R05 Cough | 65 | 16.3 | R05 Cough | 34 | 3.7 |
| A91 Abnormal result investigation NOS | 49 | 12.3 | R79 Other abnormal findings of blood chemistryR919 Abnormal findings on diagnostic imaging of lung | 2 | 0.2 |
| R02 Shortness of breath/dyspnoea | 42 | 10.5 | R060 Dyspnoea | 9 | 1.0 |
| R95 COPD | 19 | 4.8 | J44 COPD | 28 | 3.0 |
| A04 Weakness/tiredness | 17 | 4.3 | R53 Tiredness | 7 | 0.8 |
| T08 Weight loss | 15 | 3.8 | R63 Symptoms and signs concerning food and fluid intake | 0 | 0.0 |
| R01 Pain respiratory system | 13 | 3.3 | R07 Pain in throat and chest | 6 | 0.6 |
| R24 Haemoptysis | 12 | 3.0 | R042 Haemoptysis | 5 | 0.5 |
| L04 Chest symptom/complaint | 11 | 2.8 | R07 Pain in throat and chest(included in the results of ICPC-2 code R01) | ||
| R25 Sputum/phlegm abnormal | 9 | 2.3 | R09 Other symptoms and signs involving the circulatory and respiratory system | 0 | 0.0 |
| R03 Wheezing | 8 | 2.0 | R060 Dyspnoea(included in the results of ICPC-2 code R01) | ||
| R81 Pneumonia | 7 | 1.8 | J18 Pneumonia | 22 | 2.4 |
| Total | 337 | 84.7 | Total | 126 | 13.6 |
aOccurring in >1% of clinical features. COPD = chronic obstructive pulmonary disease. NOS = Not otherwise specified.