Male | Female |
ICD‐9 classification | n (% OLD mentions) | ICD‐9 classification | n (% OLD mentions) |
ICD‐9 chapter | | ICD‐9 chapter | |
7‐Circulatory System | 47849 (25.6%) | 7‐Circulatory System | 30145 (23.9%) |
2‐Neoplasms | 14557 (7.8%) | 2‐Neoplasms | 6894 (5.5%) |
8‐Respiratory System (excluding 490–493.9, 496) | 7326 (3.9%) | 8‐Respiratory System (excluding 490–493.9, 496) | 5066 (4.0%) |
ICD‐9 three-digit code | | ICD‐9 three-digit code | |
414 Other forms of chronic ischaemic heart disease | 18246 (9.8%) | 414 Other forms of chronic ischaemic heart disease | 10288 (8.2%) |
410 Acute myocardial infarction | 15269 (8.2%) | 410 Acute myocardial infarction | 8357 (6.6%) |
162 Malignant neoplasm of trachea, bronchus and lung | 6824 (3.7%) | 428 Heart failure | 3119 (2.5%) |
485 Bronchopneumonia, organism unspecified | 3534 (1.9%) | 162 Malignant neoplasm of trachea, bronchus and lung | 3108 (2.5%) |
428 Heart failure | 3037 (1.6%) | 485 Bronchopneumonia, organism unspecified | 2961 (2.4%) |
ICD‐9 four-digit code | | ICD‐9 four-digit code | |
4100 Acute myocardial infarction | 15269 (8.2%) | 4149 Other forms of ischaemic heart disease; unspecified | 8429 (6.7%) |
4149 Other forms of ischaemic heart disease; unspecified | 13530 (7.2%) | 4100 Acute myocardial infarction | 8357 (6.6%) |
1629 Malignant neoplasm of trachea, bronchus, and lung; bronchus and lung, unspecified | 6600 (3.5%) | 1629 Malignant neoplasm of trachea, bronchus, and lung; bronchus and lung, unspecified | 3014 (2.4%) |
4140 Other forms of ischaemic heart disease; coronary atherosclerosis | 4257 (2.3%) | 4850 Bronchopneumonia, organism unspecified | 2961 (2.4%) |
4850 Bronchopneumonia; organism unspecified | 3068 (1.6%) | 4360 Acute but ill-defined cerebrovascular disease# | 2135 (1.7%) |