Table 1.

ICD-10 codes and additional conditions used to define the incidence of PS and TS

Disease (ICD-10 code)	Additional conditions
Pyogenic spondylitis	No previous pyogenic spondylitis history within 1 year, and history of inpatient hospitalization during 1 year
Osteomyelitis of vertebra (M46.2)
Infection of intervertebral disc (pyogenic) (M46.3)
Discitis, unspecified (M46.4)
Other infective spondylopathies (M46.5)
Other specified inflammatory spondylopathies (M46.8)
Enterobacterial spondylitis (M49.2)
Spondylopathy in other infectious and parasitic diseases classified elsewhere (M49.3)
Tuberculous spondylitis	No previous tuberculous spondylitis history within 1 year
Tuberculosis of spine (M49.0)

ICD-10 : International Classification of Disease, 10th edition, PS : pyogenic spondylitis, TS : tuberculous spondylitis