Table 3.
Distribution of primary ICD-9 codes in MIMIC-II (version 2.4)
| MICU Stays, No. (% of Unit Stays) | SICU, No., (% of Unit Stays) | CSRU, No., (% of Unit Stays) | CCU, No. (% of Unit Stays) | Total No. (% of Unit Stays) | |
|---|---|---|---|---|---|
| Infectious and parasitic diseases, ie, septicemia, other infectious and parasitic diseases, etc (001–139) | 1319 (15.2%) | 179 (3.0%) | 30 (0.6%) | 75 (2.2%) | 1603 (7.0%) |
| Neoplasms of digestive organs and intrathoracic organs, etc (140–239) | 651 (7.5%) | 630 (10.5%) | 212 (4.5%) | 69 (2.0%) | 1562 (6.8%) |
| Endocrine, nutritional, metabolic, and immunity (240–279) | 482 (5.5%) | 92 (1.5%) | 24 (0.5%) | 35 (1.0%) | 633 (2.8%) |
| Diseases of the circulatory system, ie, ischemic heart diseases, diseases of pulmonary circulation, dysrhythmias, heart failure, cerebrovascular diseases, etc. (390–459) | 1068 (12.3%) | 1,380 (23.0%) | 3758 (79.8%) | 2725 (78.8%) | 8931 (39.1%) |
| Pulmonary diseases, ie, pneumonia and influenza, chronic obstructive pulmonary disease, etc. (460–519) | 1707 (19.6%) | 126 (2.1%) | 121 (2.6%) | 114 (3.3%) | 2068 (9.0%) |
| Diseases of the digestive system (520–579) | 1302 (15.0%) | 756 (12.6%) | 75 (1.6%) | 96 (2.8%) | 2229 (9.7%) |
| Diseases of the genitourinary system, ie, nephritis, nephrotic syndrome, nephrosis, and other diseases of the genitourinary system (580–629) | 338 (3.9%) | 55 (0.9%) | 9 (0.2%) | 46 (1.3%) | 448 (2.0%) |
| Trauma (800–959) | 235 (2.7%) | 1972 (32.8%) | 86 (1.8%) | 43 (1.2%) | 2336 (10.2%) |
| Poisoning by drugs and biological substances (960–979) | 293 (3.4%) | 22 (0.4%) | 4 (0.1%) | 15 (0.4%) | 334 (1.5%) |
| Other | 1305 (15.0%) | 792 (13.2%) | 388 (8.2%) | 241 (7.0%) | 2726 (11.9%) |
| Total | 8700 (100.0%) | 6004 (100.0%) | 4707 (100.0%) | 3459 (100.0%) | 22,870 (100.0%) |
ICD-9, International Classification of Diseases, 9th Revision; MIMIC-II, Multiparameter Intelligent Monitoring in Intensive Care II; MICU, medical intensive care unit; SICU, surgical intensive care unit; CSRU, cardiac surgery recovery unit; CCU, coronary care unit.