Attitudes Towards Prophylactic Colectomy in Hereditary Non-polyposis Colorectal Cancer (HNPCC) Patients
The purpose of this study is to learn more about individual's with a family history of colon cancer and the process by which they may decide to undergo or not undergo prophylactic colectomy. This is a surgery to remove the colon in order to reduce risk of cancer (or of getting cancer again).
|Study Design:||Observational Model: Family-Based
Time Perspective: Cross-Sectional
|Official Title:||Attitudes Towards Prophylactic Colectomy in HNPCC Patients|
- To assess levels of intention in prophylactic colectomy among individuals at increased familial risk of colorectal cancer and to identify distinctive decision types based on profiles of perceived pros and cons of prophylactic colectomy; [ Time Frame: 12 months ] [ Designated as safety issue: No ]
|Study Start Date:||November 2004|
|Study Completion Date:||December 2009|
|Primary Completion Date:||December 2009 (Final data collection date for primary outcome measure)|
Affected patients who are at high risk for metachronous colorectal tumors due to mutation status.
Other: Telephone survey
Unaffected patients who are at high risk for developing colon cancer based on family history and/or mutation status.
Other: Telephone survey
Hereditary non-polyposis colorectal cancer (HNPCC) is associated with up to an 80% lifetime risk of developing colorectal cancer and a 40-50% chance of a metachronous tumor after partial colectomy for the disease. For these patients, prophylactic colectomy has been proposed as a potential risk management alternative to a lifetime of intensive surveillance by colonoscopy. The highly personal nature of such risk management decisions has been recognized in the development of individualized genetic counseling services. However, prior psychosocial research in this area has tended to use linear statistical techniques in which clinically important details are lost in an overly broad, one size-fits-all model that is difficult to apply in a one-to-one counseling session. We propose an innovative approach based on the Cognitive-Social Health Information Processing (C-SHIP) model in which we will explore how attitudes towards prophylactic colectomy are organized into meaningful patterns or types that can translate readily into tailored counseling recommendations. Specific aims of this study are: 1)to assess levels of intention in prophylactic colectomy among HNPCC patients; 2)To identify distinctive decision types based on profiles of perceived pros and cons of prophylactic colectomy; and 3) To explore the pattern of relations between decision types and counseling-related outcomes (level of intention in colectomy, cancer-specific anxiety, and colonoscopy adherence). We will conduct a one-time cross-sectional telephone survey of 320 HNPCC patients (defined as either carriers of a mutated mismatch repair gene associated with HNPCC or those with a personal/family history meeting published criteria for HNPCC). Using cluster analysis we will create a taxonomy of decision types. Prior research leads us to expect at least three types: Disengaged, Risk-Focused, and Ambivalent. We hypothesize that each type will have a different pattern of relations with the outcome variables (e.g., Risk-focused types will show higher level of intention regarding surgery, high anxiety, low avoidance, and high colonoscopy adherence, whereas Ambivalent types will show higher level of intention regarding surgery, high anxiety, high avoidance, and low colonoscopy adherence). Understanding these patterns will enhance the ability of physicians, genetic counselors, and other providers to help their patients make well informed, thoughtful decisions about the preventive strategy that will best protect their health, emotional well-being, and quality of life.
Please refer to this study by its ClinicalTrials.gov identifier: NCT00582452
|United States, New York|
|Memorial Sloan Kettering Cancer Center|
|New York, New York, United States, 10065|
|Principal Investigator:||Karen Hurley, PhD||Memorial Sloan Kettering Cancer Center.|