Check diagnostic for event-dependent observation end

This diagnostic tests whether there is a dependency between the event and the end of observation. It does so by adding a probe window at the end of observation, and checking whether the rate of the outcome is elevated (or decreased) during this window.

The end of observation probe window will automatically be added to the model by the createSccsIntervalData() function, unless the endOfObservationEraLength argument is set to 0. This function extracts the estimate for that window from the model, and compares it to the nullBounds.#'

Usage

checkEventObservationIndependenceAssumption(sccsModel, nullBounds = c(0.5, 2))

Arguments

sccsModel

A fitted SCCS model as created using fitSccsModel().

nullBounds

The bounds for the null hypothesis on the incidence rate ratio scale.

Value

A tibble with one row and four columns: ratio indicates the estimates incidence rate ratio for the probe at the end of observation. 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.