Screening of Alberta Asbestos Exposed Workers for Lung Cancer and Mesothelioma

University of Calgary

Status and phase

Terminated

Phase 2

Conditions

Lung Cancer

Mesothelioma

Treatments

Procedure: Low-dose computed tomography Annual scan x3

Procedure: Low-dose computed tomography Baseline scan only

Study type

Interventional

Funder types

Other

Identifiers

NCT02385812

10007822

Details and patient eligibility

About

Asbestos defines a group of naturally occurring mineral silicate fibers which are easily inhaled, resulting in a variety of diseases of the respiratory system including lung cancer and malignant mesothelioma. Despite some advances in treatment, there has been little impact on overall survival for both lung cancer and mesothelioma in the past 20 years in great part because patients usually present with disease at an advanced and incurable stage. This study aims to develop and implement a low-dose computed tomography (LDCT) screening approach for lung cancer and mesothelioma in asbestos-exposed workers in Alberta.

Full description

In Canada, lung cancer is the primary cause of cancer mortality above the next three culprits combined (breast, colon and prostate cancer). Cigarette smoking is the most important risk factor in the development of lung cancer. Another population of particular interest in Alberta involves workers with occupational exposure to asbestos as asbestos and tobacco exposure results in a synergistic effect on lung cancer risk. Mesothelioma is a rare cancer of the lining of the lung with poor prognosis of which 80% of cases are believed to be related to asbestos exposure.

Unfortunately, despite some advances in treatment, there has been little impact on overall survival for both lung cancer and mesothelioma in the past 20 years in great part because patients usually present with disease at an advanced and incurable stage. Additional strategies are desperately needed to reduce the morbidity and mortality associated with this disease.

The objectives of this study are to develop and implement a LDCT screening approach for lung cancer and mesothelioma in asbestos-exposed workers in Alberta; to determine participants' motivation and expectations associated with a screening program, their satisfaction with the program, and the psychosocial consequences of the screening program; to determine the accuracy of a lung cancer risk prediction model modified to include asbestos exposure; and to determine the 3-year clinical incidence of lung cancer in asbestos-exposed individuals interested in lung cancer screening but who do not meet minimal risk threshold.

The investigators will offer a combined lung cancer and mesothelioma screening program for 200 Alberta asbestos-exposed workers based on low-dose CT scanning.

Enrollment

200 estimated patients

Sex

All

Ages

50 to 80 years old

Volunteers

Accepts Healthy Volunteers

Inclusion criteria

Age 50 - 80 years (either gender, any ethnic group)
Documented exposure to asbestos for at least one year, at least 10 years prior to study entry
Ability to provide informed consent and participate in study procedures

Exclusion criteria

Any medical condition, such as severe heart disease (e.g. unstable angina, chronic congestive heart failure), severe lung disease or lung disease requiring supplemental oxygen, solid organ transplant, that in the opinion of the physician unlikely to benefit from screening due to shortened life-expectancy from the co-morbidities or inability to tolerate diagnosis and treatment of a screen detected abnormality
Have been previously diagnosed with lung cancer or mesothelioma
Have had other cancer within the past 5 years with the exception of the following cancers: non-melanomatous skin cancer, localized prostate cancer, carcinoma in situ (CIS) of the cervix, or superficial bladder cancer. Treatment of the exceptions must have ended >6 months before registration into this study
Pregnancy
CT scan of the chest in the past 2 years
Unwilling to have a LDCT of chest
Unwilling to sign a consent