Table 4 Causes of hospitalization when rheumatoid arthritis was not coded as the main diagnosis
ICD-9-MC codes | N | % |
|---|---|---|
1. Infectious and parasitic diseases (001–139) | 7447 | 2.61% |
2. Neoplasms (140–239) | 20,514 | 7.19% |
3. Endocrine, metabolic, and nutritional diseases and immune disorders (240–279) | 5500 | 1.93% |
4. Diseases of the blood and haematopoietic organs (280–289) | 5434 | 1.90% |
5. Mental, behavioural and neurodevelopmental disorders (290–319) | 2429 | 0.85% |
6. Diseases of the nervous system and the sense organs (320–389) | 6726 | 2.36% |
7. Diseases of the circulatory system (390–459) | 54,123 | 18.97% |
8. Diseases of the respiratory system (460–519) | 49,876 | 17.48% |
9. Diseases of the digestive system (520–579) | 31,864 | 11.17% |
10. Diseases of the genitourinary system (580–629) | 15,675 | 5.49% |
11. Complications of pregnancy, childbirth and puerperium (630–679) | 3466 | 1.21% |
12. Diseases of the skin and subcutaneous tissue (680–709) | 4915 | 1.72% |
13. Diseases of the osteomyoarticular system and connective tissue (710–739) | 32,003 | 11.21% |
14. Congenital anomalies (740–759) | 383 | 0.13% |
15. Signs, symptoms and ill-defined states (780–799) | 12,385 | 4.34% |
16. Injuries and poisoning (800–999) | 27,579 | 9.66% |
17. Factors that influence the state of health and contact with health services (V01-V89) | 4922 | 1.72% |
18. Lost to follow-up (ZZZ.ZP) | 140 | 0.05% |
Total | 285,381 | 100% |