Clinical rheumatology · 2021
The U.S. Veterans Health Administration national giant cell arteritis (GCA) database cohort: incident ophthalmic complications in biopsy-negative GCA patients.
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Chung Sarah H, Morcos Meredith B, Pollock P Scott, Ng Bernard
Аннотация
INTRODUCTION/OBJECTIVES: This study aimed to identify the incidence of ophthalmic complications of giant cell arteritis (GCA) among subjects with negative temporal artery biopsy (TAB) and to determine if duration of prednisone exposure relative to GCA diagnosis was associated with ophthalmic complications in TAB-negative subjects.
METHOD: The U.S. Veterans Health Administration (VHA) national database was queried for subjects between 1999 and 2017 with ICD-9/-10 diagnosis code for GCA, procedure code for TAB, and ICD-9/-10 diagnosis code for blindness, anterior or posterior ischemic optic neuropathy, or branch or central retinal artery occlusion. Pharmacy data regarding prednisone dispensation were collected. A Cox proportional hazard model was performed using ophthalmic complication by 1 year as the outcome variable in TAB-negative subjects, adjusting for age, TAB length, TAB laterality, and prednisone dose relative to GCA diagnosis date.
RESULTS: Incident ophthalmic complication occurred by 1 year in 9.6% with positive TAB and in 6.2% with negative TAB. The majority of complications occurred within the first month for both groups. Compared to a reference group of prednisone initiation 0-14 days prior to GCA diagnosis, ophthalmic complications in TAB-negative subjects were significantly higher when prednisone initiation was delayed 14-28 days after GCA diagnosis.
CONCLUSIONS: A substantial number of TAB-negative subjects accrued an incident ICD-9/-10 code for ophthalmologic complication within a year after diagnosis, most occurring within the first month. Delaying prednisone initiation 14-28 days after GCA diagnosis in TAB-negative subjects led to a 3.5-fold higher rate of ophthalmic events occurring by 1 year. Key Points • This study provides an incidence rate of ophthalmic complication by one year in biopsy-negative subjects suspected of having GCA. • Delaying prednisone initiation 14-28 days after GCA diagnosis in TAB-negative GCA subjects led to a 3.5-fold higher rate of ophthalmic events occurring by 1 year.
METHOD: The U.S. Veterans Health Administration (VHA) national database was queried for subjects between 1999 and 2017 with ICD-9/-10 diagnosis code for GCA, procedure code for TAB, and ICD-9/-10 diagnosis code for blindness, anterior or posterior ischemic optic neuropathy, or branch or central retinal artery occlusion. Pharmacy data regarding prednisone dispensation were collected. A Cox proportional hazard model was performed using ophthalmic complication by 1 year as the outcome variable in TAB-negative subjects, adjusting for age, TAB length, TAB laterality, and prednisone dose relative to GCA diagnosis date.
RESULTS: Incident ophthalmic complication occurred by 1 year in 9.6% with positive TAB and in 6.2% with negative TAB. The majority of complications occurred within the first month for both groups. Compared to a reference group of prednisone initiation 0-14 days prior to GCA diagnosis, ophthalmic complications in TAB-negative subjects were significantly higher when prednisone initiation was delayed 14-28 days after GCA diagnosis.
CONCLUSIONS: A substantial number of TAB-negative subjects accrued an incident ICD-9/-10 code for ophthalmologic complication within a year after diagnosis, most occurring within the first month. Delaying prednisone initiation 14-28 days after GCA diagnosis in TAB-negative subjects led to a 3.5-fold higher rate of ophthalmic events occurring by 1 year. Key Points • This study provides an incidence rate of ophthalmic complication by one year in biopsy-negative subjects suspected of having GCA. • Delaying prednisone initiation 14-28 days after GCA diagnosis in TAB-negative GCA subjects led to a 3.5-fold higher rate of ophthalmic events occurring by 1 year.