Effects of Marijuana Used on Lung Function in Persons With Chronic Obstructive Pulmonary Disease (COPD)

The main hypothesis is that persons that smoke or smoked tobacco and marihuana have worsen lung function as compared with persons that only smoke or smoked tobacco.

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Key information

Conditions

Chronic Obstructive Pulmonary Disease Behavior Chronic Disease Disease Attributes Lung Diseases Lung Diseases, Obstructive Marijuana Smoking Marijuana Use Pathologic Processes Pathological Conditions, Signs and Symptoms Pulmonary Disease, Chronic Obstructive Respiratory Tract Diseases Smoking Smoking, Non-Tobacco Products

Age range

25 year–90 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Lyndon B Johnson General Hospital, Houston, Texas, United States

About this study

We will follow persons with already diagnosed COPD (chronic bronchitis and/or emphysema). Obtain their smoking history: tobacco and marihuana and review their pulmonary function study results. Then we are planning to compare both groups.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

COPD patients former or current tobacco smokers
COPD patients former or current tobacco and marihuana smokers

Exclusion criteria

History of COPD without pulmonary function testing
Refusal to provide smoking or marihuana used history

Treatment and study plan

Primary outcomes

Obstructive limitation in pulmonary function test

Time frame: 1 year

Comparison on the severity of obstruction among both groups

Secondary outcomes

Decreased diffusion capacity for carbon monoxide

Time frame: 1 year

Comparison on the severity of decreased DLco among groups.
Airtrapping

Time frame: 1 year

Comparison on the severity of air-trapping by pulmonary function testing among groups.

Sponsors and collaborators

Lead sponsor

The University of Texas Health Science Center, Houston

Other

Registry information

Official study title

Effects of Marijuana Smoking on Pulmonary Function in Patients With COPD

Important dates

Study start: 2010
Primary completion: 2016
Study completion: 2016
First posted: Mar 31, 2010
Registry last updated: May 15, 2017

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Published trials that share one or more normalized conditions with this study.

Completed