import type { LmsRow, Sex, Indicator, ChartSet } from './types.js';
/**
 * Look up LMS values for a given index (age in days/months or length/height in cm).
 * Uses binary search + linear interpolation between adjacent points.
 *
 * Returns null if the index is out of the table's range.
 */
export declare function lookupLms(table: LmsRow[], index: number): LmsRow | null;
/**
 * Determine which table to load and what index to use for an indicator.
 * Returns the table key and the age/measurement index.
 */
interface TableLookupParams {
    indicator: Indicator;
    sex: Sex;
    ageInDays?: number;
    lengthHeight?: number;
    chartSet?: ChartSet;
    gestationalAgeWeeks?: number;
}
interface ResolvedTable {
    table: LmsRow[];
    index: number;
}
/**
 * Load and resolve the appropriate LMS table + index for a given indicator.
 * Dispatches to the correct chart set (WHO or Down syndrome).
 */
export declare function resolveTable(params: TableLookupParams): Promise<ResolvedTable | null>;
export {};
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