viernes, 18 de febrero de 2011

Acúfenos: Sección Psicología, el efecto de la lista de espera sobre los acufenos

The effect of waiting: A meta-analysis of wait-list control groups in trials for tinnitusnext term distress

Hugo Hessera, low asterisk, E-mail The Corresponding Author, Cornelia Weisea, Winfried Riefb and Gerhard Anderssona, c
a Department of Behavioural Sciences and Learning, Linnaeus Centre, Swedish Institute for Disability Research, Linköping University, Linköping, Sweden
b Department of Clinical Psychology, University of Marburg, Marburg, Germany
c Department of Clinical Neuroscience, Psychiatry Section, Karolinska Institutet, Stockholm, Sweden
Received 3 September 2010; 
revised 15 November 2010; 
accepted 14 December 2010. 
Available online 8 February previous term



The response rates and effects of being placed on a wait-list control condition are well documented in psychiatric populations.

Despite the usefulness of such estimates and the frequent use of no-treatment controls in clinical trials for previous termtinnitus,next term the effect of waiting in a previous termtinnitusnext term trial has not been investigated systematically.

The aim of the present study was to quantify the overall effect of wait-list control groups on previous termtinnitusnext term distress.


Studies were retrieved via a systematic review of randomised controlled trials of cognitive behaviour therapy for previous termtinnitusnext term distress.
Outcomes of psychometrically robust previous termtinnitusnext term-specific measures (previous termTinnitusnext term Handicap Inventory, previous termTinnitusnext term Questionnaire, previous termTinnitusnext term Reaction Questionnaire) from wait-list control groups were quantified using meta-analytic techniques.
Percentage of change and standard mean difference effect sizes were calculated using the pre and post wait period.


Eleven studies involving 314 wait-list subjects with previous termtinnitusnext term were located.
The analysis for a waiting period of 6 to 12 weeks revealed a mean decrease in scores on previous termtinnitusnext term-specific measures of 3% to 8%.
Across studies, a statically significant small mean within-group effect size was obtained (Hedges' g=.17).

The effects were moderated by methodological quality of the trial, sample characteristics (i.e., age, previous termtinnitusnext term duration), time of the wait-list and how diagnosis was established.


Subjects in a previous termtinnitusnext term trial improve in previous termtinnitusnext term distress over a short waiting phase.

The effects of waiting are highly variable and depend on the characteristics of the sample and of the trial.
Keywords: previous termTinnitusnext term; Meta-analysis; Placebo effects; Wait-list group; Randomised controlled trial; Benchmark

Fuente :Journal of Psychosomatic Research
Article in Press, Corrected Proof - Note to users

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