Authors |
Tonelli M, Jose P, Curhan G, Sacks F, Braunwald E, Pfeffer M; Cholesterol and Recurrent Events (CARE) Trial Investigators. |
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Title |
Proteinuria, impaired kidney function, and adverse outcomes in people with coronary disease: analysis of a previously conducted randomised trial |
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Full source | BMJ. 2006 Jun 17;332(7555):1426 | |
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Abstract |
OBJECTIVES:
To determine whether data on proteinuria are useful for refining estimates
of risk based on kidney function alone, and whether the results of kidney
function tests can be a useful adjunct to data on proteinuria. DESIGN:
Analysis of data from a randomised trial. Impaired kidney function was
defined as low glomerular filtration rate (< 60 ml/min/1.73 m2) and
proteinuria (> or = 1+ protein) on dipstick urinalysis. SETTING: Study
of cholesterol and recurrent events: a randomised trial of pravastatin
40 mg daily versus placebo. PARTICIPANTS: 4098 men and women with previous
myocardial infarction. MAIN OUTCOME MEASURES: All cause mortality and
cardiovascular events. RESULTS: 371 participants died in nearly 60 months
of follow-up. Compared with participants without proteinuria or impaired
kidney function, patients with both characteristics were at high risk
(hazard ratio 2.39, 95% confidence interval 1.72 to 3.30), and those with
only proteinuria or only impaired kidney function were at intermediate
risk (1.69, 1.32 to 2.16; 1.41, 1.12 to 1.79, respectively) of dying from
any cause. The results were similar for cardiovascular outcomes, including
new cases of heart failure, stroke, and coronary death or non-fatal myocardial
infarction. A graded increase in the risk of all cause mortality was seen
for severity of renal impairment and degree of proteinuria by dipstick.
CONCLUSIONS: The presence or absence of proteinuria on dipstick urinalysis
may be used to refine estimates of risk based on kidney function alone.
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