Skip Navigation LinksHome > April 2013 - Volume 56 - Issue 4 > The Management of Patients with T1 Adenocarcinoma of the Low...
Diseases of the Colon & Rectum:
doi: 10.1097/DCR.0b013e3182805eb8
Original Contribution: Colorectal/Anal Neoplasia

The Management of Patients with T1 Adenocarcinoma of the Low Rectum: A Decision Analysis

Johnston, Calvin F. M.Sc.1; Tomlinson, George Ph.D.1; Temple, Larissa K. M.D., Ph.D.2; Baxter, Nancy N. M.D., Ph.D.3

Collapse Box

Abstract

BACKGROUND: Decision making for patients with T1 adenocarcinoma of the low rectum, when treatment options are limited to a transanal local excision or abdominoperineal resection, is challenging.

OBJECTIVES: The aim of this study was to develop a contemporary decision analysis to assist patients and clinicians in balancing the goals of maximizing life expectancy and quality of life in this situation.

DESIGN: We constructed a Markov-type microsimulation in open-source software. Recurrence rates and quality-of-life parameters were elicited by systematic literature reviews. Sensitivity analyses were performed on key model parameters.

PATIENTS AND SETTING: Our base case for analysis was a 65-year-old man with low-lying T1N0 rectal cancer. We determined the sensitivity of our model for sex, age up to 80, and T stage.

MAIN OUTCOME MEASURES: The main outcome measured was quality-adjusted life-years.

RESULTS: In the base case, selecting transanal local excision over abdominoperineal resection resulted in a loss of 0.53 years of life expectancy but a gain of 0.97 quality-adjusted life-years. One-way sensitivity analysis demonstrated a health state utility value threshold for permanent colostomy of 0.93. This value ranged from 0.88 to 1.0 based on tumor recurrence risk. There were no other model sensitivities.

LIMITATIONS: Some model parameter estimates were based on weak data.

CONCLUSIONS: In our model, transanal local excision was found to be the preferable approach for most patients. An abdominoperineal resection has a 3.5% longer life expectancy, but this advantage is lost when the quality-of-life reduction reported by stoma patients is weighed in. The minority group in whom abdominoperineal resection is preferred are those who are unwilling to sacrifice 7% of their life expectancy to avoid a permanent stoma. This is estimated to be approximately 25% of all patients. The threshold increases to 12% of life expectancy in high-risk tumors. No other factors are found to be relevant to the decision.

© The ASCRS 2013

Login

Article Tools

Share

Search for Similar Articles
You may search for similar articles that contain these same keywords or you may modify the keyword list to augment your search.