Please note that the copy function is not enabled for this field.
If you wish to
modify
existing outcomes, please copy and paste the current outcome text into the Update field.
LOGIN
CREATE ACCOUNT
LOGIN
CREATE ACCOUNT
MY TRIALS
REGISTER TRIAL
FAQs
HINTS AND TIPS
DEFINITIONS
Trial Review
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been endorsed by the ANZCTR. Before participating in a study, talk to your health care provider and refer to this
information for consumers
Download to PDF
Trial registered on ANZCTR
Registration number
ACTRN12613000143729
Ethics application status
Approved
Date submitted
4/02/2013
Date registered
6/02/2013
Date last updated
19/02/2013
Type of registration
Retrospectively registered
Titles & IDs
Public title
A Randomised, Clinical Trial of Corneal Collagen Cross-Linking in Keratoconus
Query!
Scientific title
A Prospective, Randomised, Clinical Trial of Corneal Collagen Cross-Linking in Keratoconus to determine the change in the maximum simulated keratometry value on corneal topography over 5 years.
Query!
Secondary ID [1]
281884
0
Nil
Query!
Universal Trial Number (UTN)
Query!
Trial acronym
Query!
Linked study record
Query!
Health condition
Health condition(s) or problem(s) studied:
keratoconus
288277
0
Query!
Condition category
Condition code
Eye
288628
288628
0
0
Query!
Diseases / disorders of the eye
Query!
Intervention/exposure
Study type
Interventional
Query!
Description of intervention(s) / exposure
corneal collagen cross-linking. Cross-linking is a single treatment involving the use of riboflavin and UVA light to increase the strength of the cornea. The cornea is treated with riboflavin drops for 30 minutes followed by exposure to UVA irradiation for a 30 minutes, during which the riboflavin drops are continued.
Query!
Intervention code [1]
286448
0
Treatment: Surgery
Query!
Comparator / control treatment
no treatment
Query!
Control group
Active
Query!
Outcomes
Primary outcome [1]
288779
0
maximum simulated keratometry value measured using computerised videokeratography (Orbscan II; Bausch and Lomb Surgical, Utah. Patients recruited after November 2007 were also imaged with Scheimplug imaging (Pentacam HR, Oculus, Germany)
Query!
Assessment method [1]
288779
0
Query!
Timepoint [1]
288779
0
5 years
Query!
Secondary outcome [1]
300982
0
uncorrected visual acuity expressed as logarithm of the minimum angle of resolution (logMAR)
Query!
Assessment method [1]
300982
0
Query!
Timepoint [1]
300982
0
5 years
Query!
Secondary outcome [2]
300983
0
best-spectacle corrected visual acuity expressed as logarithm of the minimum angle of resolution (logMAR)
Query!
Assessment method [2]
300983
0
Query!
Timepoint [2]
300983
0
5 years
Query!
Secondary outcome [3]
300984
0
subjective refraction (sphere and cylinder) performed by trained orthoptists
Query!
Assessment method [3]
300984
0
Query!
Timepoint [3]
300984
0
5 years
Query!
Secondary outcome [4]
300985
0
minimum simulated keratometry value measured using computerised videokeratography (Orbscan II; Bausch and Lomb Surgical, Utah). Patients recruited after November 2007 were also imaged with Scheimplug imaging (Pentacam HR, Oculus, Germany)
Query!
Assessment method [4]
300985
0
Query!
Timepoint [4]
300985
0
5 years
Query!
Secondary outcome [5]
300986
0
corneal thickness at the thinnest point using ultrasound pachymetry (Pachy Meter SP3000; Tomey, Nagoya, Japan), computerised videokeratography (Orbscan II; Bausch and Lomb Surgical, Utah) and Scheimplug imaging (Pentacam HR, Oculus, Germany)
Query!
Assessment method [5]
300986
0
Query!
Timepoint [5]
300986
0
5 years
Query!
Secondary outcome [6]
300987
0
endothelial cell density using the SP 2000 Specular Microscope (Topcon Corp, Tokyo, Japan)
Query!
Assessment method [6]
300987
0
Query!
Timepoint [6]
300987
0
5 years
Query!
Secondary outcome [7]
300988
0
intraocular pressure using the Tonopen XL (Medtronic, Jacksonville, Florida) and Goldmann applanation tonometer (Haag Streit, Konitz, Switzerland)
Query!
Assessment method [7]
300988
0
Query!
Timepoint [7]
300988
0
5 years
Query!
Eligibility
Key inclusion criteria
At least one of the following criteria met over the preceding 12 months: an increase of at least 1 diopter in the steepest simulated keratometry reading derived from computerized videokeratography or in the steepest meridian measured by manual keratometry; an increase in astigmatism as determined by manifest subjective refraction of at least 1 diopter; or a 0.1mm or more decrease in back optic-zone radius of the best fitting contact lens
Query!
Minimum age
16
Years
Query!
Query!
Maximum age
50
Years
Query!
Query!
Sex
Both males and females
Query!
Can healthy volunteers participate?
No
Query!
Key exclusion criteria
Minimum corneal thickness less than 400 microns; axial corneal scarring, previous refractive or other corneal surgery; a history of chemical burns; severe infections or other corneal or ocular surface disorders; patients who were pregnant or breastfeeding at the time of enrolment
Query!
Study design
Purpose of the study
Treatment
Query!
Allocation to intervention
Randomised controlled trial
Query!
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Patients meeting the inclusion criteria were recruited from the Cornea Clinic at the Hospital. Allocation to the treatment or control group was done using a computer generated randomization plan that was held off-site.
Query!
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Computer generated randomisation sequence used.
Query!
Masking / blinding
Open (masking not used)
Query!
Who is / are masked / blinded?
Query!
Query!
Query!
Query!
Intervention assignment
Parallel
Query!
Other design features
Query!
Phase
Not Applicable
Query!
Type of endpoint/s
Safety/efficacy
Query!
Statistical methods / analysis
Query!
Recruitment
Recruitment status
Active, not recruiting
Query!
Date of first participant enrolment
Anticipated
19/06/2006
Query!
Actual
Query!
Date of last participant enrolment
Anticipated
Query!
Actual
11/06/2009
Query!
Date of last data collection
Anticipated
Query!
Actual
Query!
Sample size
Target
100
Query!
Accrual to date
Query!
Final
Query!
Recruitment in Australia
Recruitment state(s)
VIC
Query!
Recruitment hospital [1]
530
0
The Royal Victorian Eye and Ear Hospital - East Melbourne
Query!
Recruitment postcode(s) [1]
6270
0
3002 - East Melbourne
Query!
Funding & Sponsors
Funding source category [1]
286669
0
Hospital
Query!
Name [1]
286669
0
Royal Victorian Eye and Ear Hospital
Query!
Address [1]
286669
0
32 Gisborne St, East Melbourne, VIC 3002
Query!
Country [1]
286669
0
Australia
Query!
Funding source category [2]
286670
0
University
Query!
Name [2]
286670
0
Eye Research Australia Foundation, Centre for Eye Research Australia, University of Melbourne
Query!
Address [2]
286670
0
32 Gisborne St, East Melbourne, VIC 3002
Query!
Country [2]
286670
0
Australia
Query!
Primary sponsor type
Hospital
Query!
Name
Royal Victorian Eye and Ear Hospital
Query!
Address
32 Gisborne St, East Melbourne, VIC 3002
Query!
Country
Australia
Query!
Secondary sponsor category [1]
285445
0
University
Query!
Name [1]
285445
0
Centre for Eye Research Australia, University of Melbourne
Query!
Address [1]
285445
0
32 Gisborne St, East Melbourne, VIC 3002
Query!
Country [1]
285445
0
Australia
Query!
Ethics approval
Ethics application status
Approved
Query!
Ethics committee name [1]
288738
0
Royal Victorian Eye and Ear Hospital Human Research and Ethics Committee
Query!
Ethics committee address [1]
288738
0
32 Gisborne St, East Melbourne, VIC 3002
Query!
Ethics committee country [1]
288738
0
Australia
Query!
Date submitted for ethics approval [1]
288738
0
Query!
Approval date [1]
288738
0
03/04/2006
Query!
Ethics approval number [1]
288738
0
05/632H
Query!
Summary
Brief summary
The technique of collagen cross-linking for keratoconus (a condition leading to thinning and protrusion of the cornea, the front clear window of the eye, leading to a reduction in vision) was introduced in Europe. It involves the use of riboflavin (vitamin B2) and ultraviolet light A, and has been shown in animal studies to strengthen the cornea. This trial was initiated to assess the effectiveness and safety of this treatment in comparison to a second group of participants who have the disease but are not given the cross-linking treatment. It runs over 5 years.
Query!
Trial website
Query!
Trial related presentations / publications
Query!
Public notes
Query!
Contacts
Principal investigator
Name
37578
0
A/Prof Grant Snibson
Query!
Address
37578
0
Royal Victorian Eye and Ear Hospital, 32 Gisborne St, East Melbourne, VIC 3002
Query!
Country
37578
0
Australia
Query!
Phone
37578
0
+61 3 9416 0695
Query!
Fax
37578
0
Query!
Email
37578
0
[email protected]
Query!
Contact person for public queries
Name
37579
0
Ms Kiera Young
Query!
Address
37579
0
Centre for Eye Research Australia, 32 Gisborne St, East Melbourne, VIC 3002
Query!
Country
37579
0
Australia
Query!
Phone
37579
0
+61 3 9929 8360
Query!
Fax
37579
0
Query!
Email
37579
0
[email protected]
Query!
Contact person for scientific queries
Name
37580
0
A/Prof Grant Snibson
Query!
Address
37580
0
Royal Victorian Eye and Ear Hospital, 32 Gisborne St, East Melbourne, VIC 3002
Query!
Country
37580
0
Australia
Query!
Phone
37580
0
+61 3 9416 0695
Query!
Fax
37580
0
Query!
Email
37580
0
[email protected]
Query!
No information has been provided regarding IPD availability
What supporting documents are/will be available?
No Supporting Document Provided
Results publications and other study-related documents
Documents added manually
No documents have been uploaded by study researchers.
Documents added automatically
No additional documents have been identified.
Download to PDF