Giant cell arteritis and mortality.
BACKGROUND
Giant cell arteritis (GCA) is a systemic vasculitis of elderly individuals associated with significant morbidity, including blindness, stroke, and myocardial infarction. Previous studies have investigated whether GCA is associated with increased mortality, with conflicting results. The objective of this study is to determine whether GCA, is associated with increased mortality.


METHODS
Forty-four cases with GCA were identified from the University of Utah Health Sciences Center, the major tertiary care center for the Intermountain West. The Utah Population Database, a unique biomedical information resource, selected cases and age- and gender-matched controls. Cases were defined as patients with a temporal artery biopsy-proven diagnosis of GCA (international classification of diseases [ICD]-9 code 446.5) between 1991 and 2005. Exclusion criteria included a negative biopsy, alternative diagnoses, or insufficient clinical data. For each of the 44 cases, 100 controls were identified; thus, 4,400 controls were included in the data analysis. Median survival time and 5-year cumulative survival were measured for cases and controls.


RESULTS
The median survival time for the 44 GCA cases was 1,357 days (3.71 years) after diagnosis compared with 3,044 days (8.34 years) for the 4,400 controls (p = 0.04). Five-year cumulative survival was 67% for the control group versus 35% for the cases (p < .001). Survival rates for cases and controls converged at approximately 11.12 years.


CONCLUSIONS
Patients with GCA were more likely than age- and gender-matched controls to die within the first 5 years following diagnosis.
Crow
R Wade
RW
Department of Ophthalmology and Visual Sciences, University of Utah Health Sciences Center, Salt Lake City, UT 84132, USA.
Katz
Bradley J
BJ
Warner
Judith E A
JE
Alder
Stephen C
SC
Zhang
Kang
K
Schulman
Susan
S
Digre
Kathleen B
KB
D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D002423:Cause of Death; D015331:Cohort Studies; D016001:Confidence Intervals; D005260:Female; D013700:Giant Cell Arteritis / Q000175:diagnosis* / Q000401:mortality*; D006801:Humans; D015994:Incidence; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D011336:Probability; D012016:Reference Values; D012042:Registries; D012189:Retrospective Studies; D012720:Severity of Illness Index; D012737:Sex Factors; D016019:Survival Analysis; D013699:Temporal Arteries / Q000473:pathology*; D014589:Utah