Using the AIPE perspective adds yet one more piece of information for the investigator to know: an appropriate size for the CI half-width. There are currently not any guidelines to determine the appropriate CI half-width for a regression, but values
between 0.10 and 0.20 for standardized regression coefficients are commonly used in the AIPE literature, so are probably a good place to start. Of course, this
somewhat depends on the hypothesized value of the regression coefficient. For example, narrower CIs are likely better with coefficient values expected to be close
to zero in order to determine if the direction of the
effect is positive or negative. Likewise, if the coefficient
is expected to be large and well beyond some threshold
set for usefulness (e.g., a clinically-relevant effect), then
Using the AIPE perspective adds yet one more piece of information for the investigator to know: an appropriate size for the CI half-width. There are currently not any guidelines to determine the appropriate CI half-width for a regression, but valuesbetween 0.10 and 0.20 for standardized regression coefficients are commonly used in the AIPE literature, so are probably a good place to start. Of course, thissomewhat depends on the hypothesized value of the regression coefficient. For example, narrower CIs are likely better with coefficient values expected to be closeto zero in order to determine if the direction of theeffect is positive or negative. Likewise, if the coefficientis expected to be large and well beyond some thresholdset for usefulness (e.g., a clinically-relevant effect), then
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