This diagnostic tests whether there is a dependency between the event and subsequent exposures.
This requires you have indicated one of the era covariates to be a pre-exposure window. This
function simply checks whether the confidence interval for the effect estimate of that pre-
exposure window overlaps with the nullBounds
.
To designate an era covariate to be the pre-exposure window, set preExposure = TRUE
when
calling createEraCovariateSettings()
. Note that, by default, preExposure
will be TRUE
if
start
is smaller than 0.
checkEventExposureIndependenceAssumption(sccsModel, nullBounds = c(0.8, 1.25))
A tibble with one row per pre-exposure window and four columns: ratio
indicates the estimates
incidence rate ratio for the pre-exposure window. lb
and ub
represent the upper and lower
bounds of the 95 percent confidence interval, and pass
is TRUE
if the confidence interval
intersects the null bounds.
A fitted SCCS model as created using fitSccsModel()
.
The bounds for the null hypothesis on the incidence rate ratio scale.