---
title: Acoustical Properties of Speech as Indicators of Suicidal Risk
nct_id: NCT00178906
overall_status: COMPLETED
sponsor: Vanderbilt University
study_type: OBSERVATIONAL
primary_condition: Depression
countries: United States
canonical_url: "https://parkinsonspathways.com/agent/trials/NCT00178906.md"
clinicaltrials_gov: "https://clinicaltrials.gov/study/NCT00178906"
ct_last_update_post_date: 2016-11-23
last_seen_at: "2026-05-12T06:40:52.985Z"
source: ClinicalTrials.gov (mirrored, no enrichment)
---
# Acoustical Properties of Speech as Indicators of Suicidal Risk

**NCT ID:** [NCT00178906](https://clinicaltrials.gov/study/NCT00178906)

## Key Facts

- **Status:** COMPLETED
- **Study Type:** OBSERVATIONAL
- **Target Enrollment:** 124
- **Lead Sponsor:** Vanderbilt University
- **Conditions:** Depression
- **Start Date:** 1999-12
- **Completion Date:** 2008-04
- **CT.gov Last Update:** 2016-11-23

## Brief Summary

This project is focused on acoustical, sound, analysis of speech in order to identify vocal characteristics of speech that are associated with suicidality. Speech samples will be collected from four populations with different mental health status: suicidal, ideational suicidal, depressed and those in remission from depression, (the control group). Speech of subjects will be recorded during routine diagnostic interview sessions. The speech samples will be acoustically analyzed via digital computer algorithms. The acoustical differences among those groups will be determined based on the statistical analysis.

## Eligibility

- **Minimum age:** 25 Years
- **Maximum age:** 65 Years
- **Sex:** ALL
- **Healthy Volunteers:** No

```
Inclusion Criteria:

* Age Range: 25 to 65 years of age
* Participants must be depressed or be in remission from depression (have a history of depression)

Exclusion Criteria:

* speech impediment
* intoxication at time of interview
```

## Locations (1)

- Vanderbilt University, Nashville, Tennessee, United States

## Recent Field Changes (last 30 days)

- `status.overallStatus` — added _(2026-05-12)_
- `status.primaryCompletionDate` — added _(2026-05-12)_
- `status.completionDate` — added _(2026-05-12)_
- `status.lastUpdatePostDate` — added _(2026-05-12)_
- `design.enrollmentCount` — added _(2026-05-12)_
- `eligibility.criteria` — added _(2026-05-12)_
- `eligibility.minAge` — added _(2026-05-12)_
- `eligibility.maxAge` — added _(2026-05-12)_
- `eligibility.sex` — added _(2026-05-12)_
- `sponsor.lead` — added _(2026-05-12)_
- `results.hasResults` — added _(2026-05-12)_
- `locations.vanderbilt university|nashville|tennessee|united states` — added _(2026-05-12)_

---

*Canonical: https://parkinsonspathways.com/agent/trials/NCT00178906.md*  
*Source data (authoritative): https://clinicaltrials.gov/study/NCT00178906*  
*This page is a raw mirror with no AI summary, no editorial enrichment, and no Parkinson's-specific filtering.*