Temporal fluctuations in suicide calls to a crisis intervention service.

Suicide-related calls received by a crisis intervention center were analyzed for temporal variations. The overall number of calls, calls concerning personal suicidal ideation, and calls concerning third-person suicide attempt varied by both month and day of the week. Ideation calls and calls involving a suicide attempt varied by day of the month. Month and day of the week variation in third-person calls paralleled variations in completed suicides. Fluctuations were large enough to be useful in scheduling crisis center staff. The possibility that third-person calls represent a greater suicide threat than first-person calls is discussed.