prec_lim_agree returns the sample size or the precision for the limit
of agreement, i.e. the confidence interval around the limit of agreement,
expressed in SD-units. It is an approximation based on the Normal distribution,
instead of a Student t distribution.
precision (the full width of the confidence interval).
Exactly one of the parameters
conf.width must be passed as NULL,
and that parameter is determined from the other.
The sample size and precision are calculated according to formulae in Bland & Altman (1986). The CI width is a simple function of the sample size only.
Object of class "presize", a list of arguments (including the computed one) augmented with method and note elements.
Bland & Altman (1986) Statistical methods for assessing agreement between two methods of clinical measurement Lancet i(8476):307-310 doi: 10.1016/S0140-6736(86)90837-8
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