Optimal Treatment for Recurrent Clostridium Difficile
- Conditions
- DifficileFidaxomicinVancomycinClostridium
- Interventions
- Registration Number
- NCT02667418
- Lead Sponsor
- VA Office of Research and Development
- Brief Summary
The purpose of this study is to determine whether fidaxomicin and vancomycin followed by taper and pulse vancomycin treatment are superior to standard vancomycin treatment for the treatment of recurrent Clostridium difficile infection.
- Detailed Description
Abstract Clostridium difficile is the most common cause of healthcare-associated infectious diarrhea among adults in industrialized countries. In addition to diarrhea, C. difficile infection (CDI) may also result in serious complications such as shock, toxic megacolon, colectomy, and death. The Centers for Disease Control and Prevention (CDC) has estimated C. difficile results in 250,000 hospital infections, 14,000 deaths, and $1 billion in excess costs annually. Recurrent CDI is the most challenging clinical dilemma facing clinicians who treat this disease. An estimated 30% of patients who respond to initial treatment with either vancomycin or metronidazole develop recurrent CDI, usually within 1-4 weeks of completing treatment.
The primary objective of this study is to determine whether 1) standard fidaxomicin treatment and 2) standard vancomycin treatment followed by taper and pulse vancomycin treatment are superior to standard vancomycin treatment alone for sustained clinical response at day 59 for all treatments, for participants with either their first or second recurrence of CDI. Veterans presenting with a first or second CDI recurrence will be screened, consented and randomly assigned in a double-blind manner equally to one of three treatment groups: 1) a 10 day course of oral vancomycin (VAN-TX), 2) a 10 day course of fidaxomicin (FID-TX) or 3) a 31 day course of vancomycin which includes a taper and pulse following daily treatment (VAN-TP/P). Symptom resolution is defined as an improvement or resolution of diarrhea ( 3 unformed bowel movements over 24 hours) for 48 consecutive hours compared to the participant's baseline. Recurrence is defined as having diarrhea (\>3 loose or semi-formed stools over 24 hours for 48 consecutive hours). A sample size of 459 randomized study participants is required to obtain 91% global power to detect a 16% absolute difference (expected proportion of 31% in the VAN-TX group) in sustained clinical response (D- COM) proportion for at least one comparison (VAN-TP/P vs. VAN-TX, FID-TX vs. VAN-TX) at the family wised error rate (FWER) 0.05 level. The marginal probability (disjunctive power) of detecting 16% absolute difference for each comparison is 81%. The expected withdrawal rate prior to day 59 (prior outcome assessment) is estimated to be 10%. If both FID-TX and VAN-TP/P are found to be superior to VAN-TX, then the non-inferiority of VAN-TP/P to FID-TX will be assessed.
With the assumption that sites recruit 4 participants (site average) per year for sites primarily recruiting from the main hospital and nearby CBOCS, and 6 participants (site average) per year for sites that could partner with independent VAMCs (Independent VAMCs LSI Application will be reviewed and approved by Central IRB) that are close in distance to allow a shared site coordinator (WOC appointed) at an increased funding level, the study is expected to complete enrollment of 459 participants within 6 years with 90 days of follow-up. This includes 2 years of pilot phase plus transitioning period from pilot phase to full study, and 4 years of full study. There were 6 sites in the pilot phase and will have 24 units (26 sites) in full phase (including 5 pilot sites and 21 additional sites). Sites that are significantly below the recruitment target for an extensive period may be considered for termination. The recruitment timeline and the number of sites will be re-evaluated based on the actual recruitment rate, the number of sites still recruiting, whether replacement or additional sites will be added, the study time period on administrative recruitment hold due to COVID-19 pandemic, and available funding resources.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 308
-
Informed consent obtained and signed
-
Age > 18
-
If female, participant must not be pregnant or nursing
- Negative pregnancy test required for females <61 years of age or without prior hysterectomy
-
Confirmed current diagnosis of CDI, determined by having
- >3 loose or semi-formed stools for participants over 24 hours AND
- Positive stool assay for C. difficile
- EIA positive for toxin A/B; or
- Cytotoxin assay; or
- Nucleic Acid Amplification Test (NAAT, PCR or LAMP) based detection of toxigenic C. difficile
-
Current episode represents the first recurrent episode of CDI within 3 months of the primary CDI episode in a patient who has not had CDI in the 3 months prior to the primary episode OR a second recurrent CDI episode occurring within 3 months of the first recurrent episode, as defined above
- At least one of the previous CDI episodes must have been confirmed by a stool assay for C. difficile
-
Inability to provide informed consent
-
Inability to take oral capsules
-
Receipt of >72 hours of antibiotics considered effective in the treatment of CDI, including:
- metronidazole
- vancomycin
- fidaxomicin
- nitazoxanide
- rifaximin
-
Prior infusion of bezlotoxumab within the previous 6 months
-
Known presence of fulminant CDI, including hypotension, severe ileus or GI obstruction or incipient toxic megacolon
-
Receipt of more than a single course of oral vancomycin, fidaxomicin, or a vancomycin tapering regimen since the primary episode of CDI as defined above
-
Known allergy to vancomycin or fidaxomicin
-
Acute or chronic diarrhea due to inflammatory bowel disease or other cause (e.g., presence of an ileostomy or colostomy) that would confound evaluation of response to CDI treatment
-
Anticipation of need for long term systemic antibiotic treatment (beyond 7 days)
-
Patients with an active diagnosis of COVID-19 will be excluded from the study, but patients who have recovered (per current CDC guidance on discontinuation of transmission-based precautions) can be included in the study.
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description Fidaxomicin Fidaxomicin Standard 10-day fidaxomicin treatment for Clostridium difficile Vancomycin Vancomycin Standard 10-day vancomycin treatment for Clostridium difficile Vancomycin T/P Vancomycin with Taper/Pulse Standard 10-day vancomycin treatment followed by taper and pulse vancomycin treatment for Clostridium difficile
- Primary Outcome Measures
Name Time Method Determine symptom resolution during treatment without any of the following: diarrhea recurrence; other non-fatal clinical events including severe abdominal pain, toxic megacolon, and colectomy; and death. Day 59 for all treatment regimens. The Primary outcome will be sustained clinical response as measured at study day 59 for all treatment regimens. Sustained clinical response is a composite outcome that includes symptom resolution during treatment without any of the following (as assessed on day 59):
1. Diarrhea recurrence
2. Other non-fatal clinical events including severe abdominal pain, toxic megacolon (where diarrhea ceases but is not a beneficial outcome), and colectomy
3. Death
- Secondary Outcome Measures
Name Time Method Symptom resolution Day 90 since randomization Diarrhea recurrence following initial symptom resolution
C.diff Health Related Quality of Life (HRQOL) Day 90 since randomization Change in patient reported C.diff Health Related Quality of Life (HRQOL) from baseline (day 0) to day 59
CDI Composite outcome measure Day 90 since randomization Sustained clinical response in CDI Composite Outcome (CDI-COM) at 90 days post randomization
Diarrhea Composite outcome measure Day 90 since randomization Sustained clinical response in Diarrhea Composite Outcome (D-COM) at 90 days post randomization
Diarrhea recurrence Day 90 since randomization Diarrhea recurrence with confirmation of recurrent CDI following initial symptom resolution
Sustained clinical response (D-COM) Day 59 since randomization Sustained clinical response (D-COM) at day 59 for subgroups (infection with the BI/NAP1/027 strain (yes, no) at study enrollment; etc.)
Sustained clinical response (CDI-COM) Day 59 since randomization Sustained clinical response (CDI-COM) at day 59 for subgroups (infection with the BI/NAP1/027 strain (yes, no) at study enrollment; etc.)
Related Research Topics
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Trial Locations
- Locations (32)
Southern Arizona VA Health Care System, Tucson, AZ
🇺🇸Tucson, Arizona, United States
VA Puget Sound Health Care System Seattle Division, Seattle, WA
🇺🇸Seattle, Washington, United States
Asheville VA Medical Center, Asheville, NC
🇺🇸Asheville, North Carolina, United States
South Texas Health Care System, San Antonio, TX
🇺🇸San Antonio, Texas, United States
VA Salt Lake City Health Care System, Salt Lake City, UT
🇺🇸Salt Lake City, Utah, United States
VA Caribbean Healthcare System, San Juan, PR
🇵🇷San Juan, Puerto Rico
Phoenix VA Health Care System, Phoenix, AZ
🇺🇸Phoenix, Arizona, United States
Oklahoma City VA Medical Center, Oklahoma City, OK
🇺🇸Oklahoma City, Oklahoma, United States
John D. Dingell VA Medical Center, Detroit, MI
🇺🇸Detroit, Michigan, United States
Clement J. Zablocki VA Medical Center, Milwaukee, WI
🇺🇸Milwaukee, Wisconsin, United States
Rocky Mountain Regional VA Medical Center, Aurora, CO
🇺🇸Aurora, Colorado, United States
James A. Haley Veterans' Hospital, Tampa, FL
🇺🇸Tampa, Florida, United States
Central Arkansas Veterans Healthcare System, Little Rock, AR
🇺🇸Little Rock, Arkansas, United States
VA Loma Linda Healthcare System, Loma Linda, CA
🇺🇸Loma Linda, California, United States
VA San Diego Healthcare System, San Diego, CA
🇺🇸San Diego, California, United States
VA Palo Alto Health Care System, Palo Alto, CA
🇺🇸Palo Alto, California, United States
VA Long Beach Healthcare System, Long Beach, CA
🇺🇸Long Beach, California, United States
VA Greater Los Angeles Healthcare System, West Los Angeles, CA
🇺🇸West Los Angeles, California, United States
Atlanta VA Medical and Rehab Center, Decatur, GA
🇺🇸Decatur, Georgia, United States
Bay Pines VA Healthcare System, Pay Pines, FL
🇺🇸Bay Pines, Florida, United States
Jesse Brown VA Medical Center, Chicago, IL
🇺🇸Chicago, Illinois, United States
Edward Hines Jr. VA Hospital, Hines, IL
🇺🇸Hines, Illinois, United States
Rehabilitation R&D Service, Baltimore, MD
🇺🇸Baltimore, Maryland, United States
VA Boston Healthcare System Jamaica Plain Campus, Jamaica Plain, MA
🇺🇸Boston, Massachusetts, United States
Louis Stokes VA Medical Center, Cleveland, OH
🇺🇸Cleveland, Ohio, United States
Durham VA Medical Center, Durham, NC
🇺🇸Durham, North Carolina, United States
VA North Texas Health Care System Dallas VA Medical Center, Dallas, TX
🇺🇸Dallas, Texas, United States
Michael E. DeBakey VA Medical Center, Houston, TX
🇺🇸Houston, Texas, United States
VA Portland Health Care System, Portland, OR
🇺🇸Portland, Oregon, United States
VA Northern California Health Care System, Mather, CA
🇺🇸Sacramento, California, United States
VA Ann Arbor Healthcare System, Ann Arbor, MI
🇺🇸Ann Arbor, Michigan, United States
North Florida/South Georgia Veterans Health System, Gainesville, FL
🇺🇸Gainesville, Florida, United States