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Caroline Sanders Department of Social Medicine,
University of Bristol, Canynge Hall, Bristol BS8 2PR
Correspondence to: Ms Sanders
Caroline.Sanders{at}bristol.ac.uk
Objectives:
To examine the frequency and quality of
reporting on quality of life in randomised controlled
trials.
Design:
Search of the Cochrane Controlled Trials
Register 1980 to 1997 to identify trials from all disciplines, from
oncology, and from cardiovascular medicine that reported on quality of
life. Assessment of abstracts from articles published from 1993 to
1996. Assessment of a sample of full reports with a standardised
instrument.
Main outcome measures:
Prevalence of reporting on
quality of life. Conditions and interventions studied in trials
reporting on quality of life. Quality of reporting on quality of life.
Results:
During 1980-97 reporting on quality of life increased from 0.63% to 4.2% for trials from all disciplines, from
1.5% to 8.2% for cancer trials, and from 0.34% to 3.6% for cardiovascular trials. Of 364 abstracts, 65% reported on drug interventions. Of a sample of
67 full reports, authors of 48 (72%) used 62 established quality of life instruments. In 15 reports (22%)
authors developed their own measures, and in 2 (3%) methods were
unclear. Response rates were given in 38 (57%), and complete reporting
on all items and scales occurred in 31 (46%).
Conclusions:
Less than 5% of all randomised
controlled trials reported on quality of life, and this proportion was
below 10% even for cancer trials. A plethora of instruments was used in different studies, and the reporting of methods and results was
often inadequate. Standards for the measurement and reporting of
quality of life in clinical trials research need to be developed.
© BMJ 1998
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