Source Code Name Case count Share of cases (%)
OUTPAT OUTPAT_ICD10(M45) Ankylosing spondylitis 2557
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(M45) Ankylosing spondylitis. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 1534
OUTPAT OUTPAT_ICD10(M461) Sacroiliitis, not elsewhere classified 1329
OUTPAT OUTPAT_ICD10(M469) Inflammatory spondylopathy, unspecified 1279
INPAT INPAT_ICD10(M45) Ankylosing spondylitis 1251
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(M461) Sacroiliitis, not elsewhere classified. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 461
INPAT INPAT_ICD9(7200A) Ankylosing spondylitis 403
INPAT INPAT_ICD8(71240) Rheumatoid arthritis and allied conditions, Spondylitis ankylopoietica 356
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(M469) Inflammatory spondylopathy, unspecified. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 329
INPAT INPAT_ICD10(M469) Inflammatory spondylopathy, unspecified 297
INPAT INPAT_ICD10(M461) Sacroiliitis, not elsewhere classified 191
OUTPAT OUTPAT_ICD10(M468) Other specified inflammatory spondylopathies 158
INPAT INPAT_ICD8(72699) Affection of sacro-iliac joint 46
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(M468) Other specified inflammatory spondylopathies. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 42
INPAT INPAT_ICD9(7209X) Unspecified inflammatory spondylopathy 37
INPAT INPAT_ICD9(7202A) Sacroiliitis, not elsewhere classified 35
INPAT INPAT_ICD10(M468) Other specified inflammatory spondylopathies 24
INPAT INPAT_ICD9(7208A) Other inflammatory spondylopathies 23
DEATH DEATH_ICD10(M45) Ankylosing spondylitis 12