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日期:2024-09-05
2008年5月25日 - Abstract. Determination of survival time among persons with screen-detected cancer is subject to lead time and length biases. The authors ......
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日期:2024-09-06
2012年5月1日 - Another confounding phenomenon in screening studies is length-biased sampling (or “length bias”). Length bias refers to the fact that ......
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日期:2024-09-05
Lead time is the length of time between the detection of a disease (usually based on new, experimental criteria) and its usual clinical presentation and diagnosis (based on traditional criteria). Lead time bias is the bias that occurs when two tests for a...
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日期:2024-09-05
This example shows how lagged predictors affect least-squares estimation of multiple linear regression models. ... Introduction Many econometric models are dynamic, using lagged variables to incorporate feedback over time. By contrast, static time series ...
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日期:2024-09-07
Intraday Bias Indicator - Examples The Intraday Bias Indicator is not perfect by any means. But at the very least, it will allow a trader to be conscious of intraday trading biases. Simple data observation reveals biases that are consistent over time and ...
Problem of immortal time bias in cohort studies: example using statins for preventing progression of
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日期:2024-09-04
Immortal time in observational studies can bias the results in favour of the treatment group, but it is not difficult to identify and avoid Well designed observational studies have made important contributions to our understanding of the risks and benefit...
Diet - Lifestyle - Disease - Health - Medicine - H.R.T. - Hormone-Replacement Therapy - New York Tim
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日期:2024-09-11
Understanding how we got into this situation is the simple part of the story. The randomized-controlled trials needed to ascertain reliable knowledge about long-term risks and benefits of a drug, lifestyle factor or aspect of our diet are inordinately exp...
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日期:2024-09-04
2012年9月25日 - 亡率並沒有使之明顯下降,可能跟篩檢本身的. 三個偏差(bias)有關:lead time bias、length time bias、overdiagnosis bias。Lead time bias....