Data Collection for the Assessment of Acute and Late Normal Tissue in Patients Treated With Proton Therapy

M.D. Anderson Cancer Center5,000 enrolled

Overview

This study collects information on the side effects of proton therapy and detailed information on the proton therapy treatment plan itself. This may help researchers develop methods to predict the risk of side effects for future patients and learn the long-term benefit of proton therapy.

PRIMARY OBJECTIVES: I. To prospectively collect data on acute and late toxicities (including second malignant neoplasms) in patients treated with proton therapy. II. To collect and store the corresponding radiation dose distribution and imaging data in order to correlate normal tissue response with dose distribution. SECONDARY OBJECTIVES: I. To derive and refine dose-response relationships for normal tissue toxicity after proton therapy. II. To document and compare symptom burden weekly during treatment and twice a month for 3 months after therapy, using the M.D. Anderson Symptom Inventory (MDASI). OUTLINE: Patients undergoing standard of care proton therapy are assessed for toxicities weekly during proton treatment, then from 1 to 3 times up to 90 days from the start of treatment and annually thereafter. Patients also complete questionnaires over 15-20 minutes at baseline, weekly during treatment, and every 2 weeks during follow up for up to 3 months.

Study Type

OBSERVATIONAL

Enrollment

5,000

Conditions

Breast Carcinoma Esophageal Carcinoma Genitourinary System Carcinoma Head and Neck Carcinoma

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * All patients scheduled for radiation treatment with protons at UTMDACC are eligible for this protocol * Patients must sign a study-specific consent form prior to study entry Exclusion Criteria: * Patients who are unable or unwilling to attend the required periodic follow-ups either at M.D. Anderson or at a different site

Outcomes

Primary Outcomes

Acute toxicities data in patients treated with proton therapy

Data will be collected from all organs receiving non-negligible proton dose during treatment. For each acute normal-tissue endpoint considered, analyses will be performed using the maximum toxicity score per patient within the 90-day follow-up. Upon analysis, the distribution of observed toxicity scores for each acute normal-tissue endpoint will be reported.

Time frame: Up to 90 days after end of treatment

Late toxicities data in patients treated with proton therapy

Data will be collected from all organs receiving non-negligible proton dose during treatment. For each late normal-tissue endpoint considered, analyses will be performed using censored time-to-event data corresponding to specified levels of injury (e.g. time to a specific grade \>= 2 late toxicity). The log-rank test will be used to compare event times in subgroups of patients with different dosimetric characteristics of treatment (e.g. portion of lung receiving \> 20 Gy: \<= 40% vs \> 40%). In addition, normal-tissue complication probability models will be fitted to data corresponding to incidence of a late endpoint within a specified time frame, with analysis limited to patients having the specified follow-up (e.g. incidence of grade \>= 2 late rectal bleeding within 2 years among patients followed for 2 years post-treatment).

Time frame: Starting 90 days or more after the end of radiotherapy

Dose-response relationships for normal tissue toxicity after proton therapy

Relevant dose-volume response models from the literature, such as the Lyman model, the parallel model, or the critical-element model will be fitted to the data when possible, and model parameter estimates reported. Confidence intervals for model parameter estimates will be derived using the profile-likelihood method.

Time frame: Up to 3 months after therapy

Secondary Outcomes

Symptom burden

Will be documented and compared using the M.D. Anderson Symptom Inventory (MDASI). The initial analysis for symptom data will be primarily descriptive in nature, and will include frequencies, proportions, means, medians, standard deviations, ranges, interquartile ranges, confidence intervals for the means, and box and whisker plots. Potential differences in symptom development between patients and between treatment variables will be explored using longitudinal analysis performed with mixed models.