Severity of suicidal ideation matters: Reexamining correlates of suicidal ideation using quantile regression.

Numerous risk factors have been identified for suicidal ideation, including perceived burdensomeness, thwarted belongingness, agitation, insomnia, nightmares, cognitive anxiety sensitivity, and rumination. However, the complexity of these associations has not been well studied; the magnitude of these effects may vary at differing levels of suicidal ideation. The present study reexamined established risk factors for suicidal ideation using quantile regression, a statistical technique that calculates the effect at numerous quantiles of suicidal ideation, as opposed to the average effect across all quantiles.