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Can resistance enhance selection of treatment? (CREST)

A randomised comparator study to assess the relative efficacy of genotypic versus virtual phenotypic resistance tests in treatment experienced patients with HIV infection for whom a change in therapy is indicated.

Status
Completed
Phases
Phase 4
Study type
Interventional
Source
ANZCTR
Registry ID
ACTRN12605000781640
Enrollment
300
Registered
2005-12-07
Start date
2001-03-06
Completion date
Unknown
Last updated
2020-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Brief summary

To compare two commercially available platforms for assessment of HIV drug resistance to determine which provides superior virological results. We hypothesise that one test will be significantly superior to the other.

Interventions

The trial will compare two different assay platforms for assessment of HIV drug resistance used to assist in the selection of antiretroviral regimens. The two platforms are genotypic testing (GT) and Virtual Phenotype testing (VP). Subjects will be randomly allocated to receive the results from one platform alone on one occasion at entry to the study. Patients will be followed for a period of one year for measures of plasma HIV RNA, CD4+ T lymphocyte count and changes to antiretroviral therapy.

The trial will compare two different assay platforms for assessment of HIV drug resistance used to assist in the selection of antiretroviral regimens. The two platforms are genotypic testing (GT) and Virtual Phenotype testing (VP). Subjects will be randomly allocated to receive the results from one platform alone on one occasion at entry to the study. Patients will be followed for a period of one year for measures of plasma HIV RNA, CD4+ T lymphocyte count and changes to antiretroviral therapy. We hypothesise that one test will be significantly superior to the other.

Sponsors

National Centre in HIV Epidemiology and Clinical Research
Lead SponsorGovernment body

Study design

Allocation
Randomised controlled trial
Intervention model
Parallel
Primary purpose
Diagnosis
Masking
Open (masking not used)

Eligibility

Sex/Gender
All
Age
0 to No maximum
Healthy volunteers
No

Inclusion criteria

HIV infected patients taking combination antiretroviral therapy, with plasma HIV RNA> 2000copies/mL, who were willing to change ARVs and who provided informed.

Exclusion criteria

Patients who were ARV naive, who were experiencing an acute illness or judged to be unable to comply with the protocol requirements.

Outcome results

None listed

Source: ANZCTR · Data processed: Feb 4, 2026