Regression-based reference limits: determination of sufficient sample size
نویسندگان
چکیده
منابع مشابه
Regression-based reference limits: determination of sufficient sample size.
Regression analysis is the method of choice for the production of covariate-dependent reference limits. There are currently no recommendations on what sample size should be used when regression-based reference limits and confidence intervals are calculated. In this study we used Monte Carlo simulation to study a reference sample group of 374 age-dependent hemoglobin values. From this sample, 50...
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BACKGROUND AND OBJECTIVE Reference limits are widely used in anthropometry, the behavioral sciences, medicine, and clinical chemistry. They describe the distribution of a quantitative variable in a healthy population, and are often a smooth function of age or another determinant. Thus, instead of estimating reference limits separately for several age groups, it is more economical and parsimonio...
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Reference limits are estimators for 'extreme' percentiles of the distribution of a quantitative diagnostic marker in the healthy population. In most cases, interest will be in the 90% or 95% reference intervals. The standard parametric method of determining reference limits consists of computing quantities of the form X̅±c·S. The proportion of covered values in the underlying population coincide...
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ژورنال
عنوان ژورنال: Clinical Chemistry
سال: 1998
ISSN: 0009-9147,1530-8561
DOI: 10.1093/clinchem/44.11.2353