# Pain Responses in Patients on Long-Term Opioid Therapy for Chronic Pain

> **NCT00656942** · — · COMPLETED · sponsor: **Massachusetts General Hospital** · enrollment: 419 (actual)

## Conditions studied

- Chronic Pain

## Interventions

- **DEVICE:** Quantitative Sensory Testing (QST)

## Key facts

- **NCT ID:** NCT00656942
- **Lead sponsor:** Massachusetts General Hospital
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2006-07
- **Primary completion:** 2013-10
- **Final completion:** 2018-12
- **Target enrollment:** 419 (ACTUAL)
- **Last updated:** 2020-07-22


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00656942

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00656942, "Pain Responses in Patients on Long-Term Opioid Therapy for Chronic Pain". Retrieved via AI Analytics 2026-06-25 from https://api.ai-analytics.org/clinical/NCT00656942. Licensed CC0.

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