Hepatitis C virus infection and the prevalence of renal insufficiency.
BACKGROUND
Hepatitis C virus (HCV) is associated with pathologic changes in the kidney. However, the association between HCV and renal dysfunction is not well defined.


METHODS
This study estimated the prevalence of renal insufficiency among veterans who received care through the Veterans Affairs Puget Sound Health Care System. The study population consisted of veterans who underwent HCV antibody testing between January 1, 1999, and December 31, 2004, and had at least one primary care or medical subspecialty visit and at least one outpatient creatinine measurement within the 18 mo before antibody testing. Veterans were excluded when they had a history of chronic dialysis, creatinine >5 mg/dl, or renal transplantation. Study data were extracted from the electronic medical record. Renal insufficiency was defined as a creatinine level > or =1.5 mg/dl. Multivariate logistic regression was performed to estimate the risk for renal insufficiency associated with HCV. Among 25,782 eligible veterans, 1928 were HCV antibody positive and 23,854 were HCV antibody negative.


RESULTS
Although the proportion with renal insufficiency was lower for antibody-positive versus -negative veterans (4.8 versus 6.0%), after adjustment for age, race, gender, diabetes, and hypertension, HCV-positive veterans had a 40% higher odds for renal insufficiency (odds ratio 1.40; 95% confidence interval 1.11 to 1.76) as compared with HCV-negative veterans.


CONCLUSIONS
HCV was associated with an increased prevalence of renal insufficiency.
Dalrymple
Lorien S
LS
Health Services Research and Development Northwest Center of Excellence, Seattle, WA 98108, USA. dalrympl@u.washington.edu
Koepsell
Thomas
T
Sampson
Joshua
J
Louie
Tin
T
Dominitz
Jason A
JA
Young
Bessie
B
Kestenbaum
Bryan
B
D003430:Cross-Sectional Studies; D005260:Female; D006526:Hepatitis C / Q000150:complications*; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D051437:Renal Insufficiency / Q000453:epidemiology* / Q000209:etiology*; D014728:Veterans