Table 2 Distribution of primary International Classification of Diseases, 9th Edition (ICD-9) codes by care unit for patients aged 16 years and above.

From: MIMIC-III, a freely accessible critical care database

Critical care unit

CCU stays, No. (% by unit)

CSRU stays, No. (% by unit)

MICU stays, No. (% by unit)

SICU stays, No. (% by unit)

TSICU stays, No. (% by unit)

Total stays, No. (% by unit)

Infectious and parasitic diseases, i.e., septicemia, other infectious and parasitic diseases, etc., (001–139)

305 (4.2%)

72 (0.8%)

3,229 (16.7%)

448 (5.6%)

152 (2.8%)

4,206 (8.6%)

Neoplasms of digestive organs and intrathoracic organs, etc., (140–239)

126 (1.8%)

287 (3.2%)

1,415 (7.3%)

1,225 (15.3%)

466 (8.6%)

3,519 (7.2%)

Endocrine, nutritional, metabolic, and immunity (240–279)

104 (1.4%)

36 (0.4%)

985 (5.1%)

178 (2.2%)

54 (1.0%)

1,357 (2.8%)

Diseases of the circulatory system, i.e., ischemic heart diseases, diseases of pulmonary circulation, dysrhythmias, heart failure, cerebrovascular diseases, etc., (390–459)

5,131 (71.4%)

7,138 (78.6%)

2,638 (13.6%)

2,356 (29.5%)

684 (12.6%)

17,947 (36.6%)

Pulmonary diseases, i.e., pneumonia and influenza, chronic obstructive pulmonary disease, etc., (460–519)

416 (5.8%)

141 (1.6%)

3,393 (17.5%)

390 (4.9%)

225 (4.1%)

4,565 (9.3%)

Diseases of the digestive system (520–579)

264 (3.7%)

157 (1.7%)

3,046 (15.7%)

1,193 (14.9%)

440 (8.1%)

5,100 (10.4%)

Diseases of the genitourinary system, i.e., nephritis, nephrotic syndrome, nephrosis, and other diseases of the genitourinary system (580–629)

130 (1.8%)

14 (0.2%)

738 (3.8%)

101 (1.3%)

31 (0.6%)

1,014 (2.1%)

Trauma (800–959)

97 (1.3%)

494 (5.4%)

480 (2.5%)

836 (10.5%)

2,809 (51.7%)

4,716 (9.6%)

Poisoning by drugs and biological substances (960–979)

50 (0.7%)

2 (0.0%)

584 (3.0%)

58 (0.7%)

11 (0.2%)

705 (1.4%)

Other

565 (7.9%)

739 (8.1%)

2,883 (14.9%)

1,204 (15.1%)

563 (10.4%)

5,954 (12.1%)

Total

7,188 (14.6%)

9,080 (18.5%)

19,391 (39.5%)

7,989 (16.3%)

5,435 (11.1%)

49,083 (100%)

  1. CCU is Coronary Care Unit; CSRU is Cardiac Surgery Recovery Unit; MICU is Medical Intensive Care Unit; SICU is Surgical Intensive Care Unit; TSICU is Trauma Surgical Intensive Care Unit.
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