Trial Outcomes & Findings for Highly Conformal, Hypofractionated, Focally Dose Escalated Post-Prostatectomy Radiotherapy (NCT NCT03388619)

Highly Conformal, Hypofractionated, Focally Dose Escalated Post-Prostatectomy Radiotherapy

Maximum tolerated dose (MTD) of image guided hypofractionated, focally dose escalated post-prostatectomy radiation is defined as the dose level at which no more than 1 of up to 6 participants experience dose limiting toxicity (DLT) during the DLT period, and the dose below that at which at least 2 (of ≤6) participants have DLT as a result of treatment. A DLT is defined as any of the following: Grade 3 rectal, small bowel, or urinary toxicity that does not resolve to Grade 2 or less within 4 days with appropriate medical management. Other grade 3 in-field toxicities attributable to radiation that does not resolve to Grade 2 or less within 4 days with appropriate medical management. And delays of more than one week in completing radiation treatment due to toxicity.

Maximum tolerated dose (MTD) of image guided hypofractionated, focally dose escalated post-prostatectomy radiation is defined as the dose level at which no more than 1 of up to 6 participants experience dose limiting toxicity (DLT) during the DLT period, and the dose below that at which at least 2 (of ≤6) participants have DLT as a result of treatment. A DLT is defined as any of the following: Grade 3 rectal, small bowel, or urinary toxicity that does not resolve to Grade 2 or less within 4 days with appropriate medical management. Other grade 3 in-field toxicities attributable to radiation that does not resolve to Grade 2 or less within 4 days with appropriate medical management. And delays of more than one week in completing radiation treatment due to toxicity.

bPFS is defined as the duration of time from start of treatment to time of prostate-specific antigen (PSA) progression or death, whichever occurs first. PSA progression (also known as biochemical failure) is defined based on elevation of PSA beyond 0.1 ng/dL. Kaplan-Meier survival analysis and effects of clinical variables on bPFS will be assessed by the Cox proportional hazards model.

The quality-of-life scores will be summarized at baseline and for each visit. Linear mixed effects model will be used to model quality of life scores at baseline and during and after treatment in which random intercept and random slope are used to account for participant-specific trajectory of quality-of-life scores.

Participants completed a 6-question questionnaire to assess erectile dysfunction.

The AUA-SI is used to measure radiation morbidity and to make treatment decisions.

Participants complete a form to assess negative mood (i.e., sadness, guilt), views of self (i.e., self-criticism, worthlessness) social cognition (loneliness, interpersonal alienation), decreased positive effect, and decreased engagement (loss of interest, meaning, and purpose) and are scored using item-level calibrations.

Participants complete a form and rate anxiety such as fear (fearfulness, panic), anxious misery (worry, dread), hyperarousal (tension, nervousness, restlessness), and somatic symptoms related to arousal (racing heart, dizziness).

Participants complete a form to assess positive psychosocial (emotional and social) outcomes of illness.

The DRS is a 5-item scale measuring distress or remorse after a health case decision. The score correlated with satisfaction with the decision (r=-0.40 to -0.60), decisional conflict (r=0.31 to 0.52), and overall rated quality of life (r=-0.25 to -0.27).

Grade 2-5 serious and/or non-serious adverse events attributable to protocol treatment. A non-serious adverse event is any untoward medical occurrence. A serious adverse event is an adverse event or suspected adverse reaction that results in death, a life-threatening adverse drug experience, hospitalization, disruption of the ability to conduct normal life functions, congenital anomaly/birth defect or important medical events that jeopardize the patient or subject and may require medical or surgical intervention to prevent one of the previous outcomes mentioned. Grade 2 is moderate. Grade 3 is serious. Grade 4 is life-threatening. And Grade 5 is death related to adverse event.

Here is the number of participants with serious and/or non-serious adverse events assessed by the Common Terminology Criteria for Adverse Events (CTCAE v4.0). A non-serious adverse event is any untoward medical occurrence. A serious adverse event is an adverse event or suspected adverse reaction that results in death, a life-threatening adverse drug experience, hospitalization, disruption of the ability to conduct normal life functions, congenital anomaly/birth defect or important medical events that jeopardize the patient or subject and may require medical or surgical intervention to prevent one of the previous outcomes mentioned.

A DLT is defined as any of the following: Grade 3 rectal, small bowel, or urinary toxicity that does not resolve to Grade 2 or less within 4 days with appropriate medical management. Other grade 3 in-field toxicities attributable to radiation that does not resolve to Grade 2 or less within 4 days with appropriate medical management. And delays of more than one week in completing radiation treatment due to toxicity.