import type { AssessmentDefinition } from "../types.ts";
/**
 * PHQ-9 — Patient Health Questionnaire-9 (depression screening).
 *
 * 9 items, 0–3 frequency scale, total score 0–27. Item 9 raises a
 * `suicidality` flag when answered above 0. The PHQ-9 is in the public
 * domain (Kroenke, Spitzer & Williams, 2001; developed with a grant from
 * Pfizer Inc.). Translations follow published validated versions — verify
 * against the official wording before clinical use.
 */
export declare const phq9: AssessmentDefinition;