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Arch Otolaryngol Head Neck Surg. 2003 Sep;129(9):987-91.

Response-shift bias and parent-reported quality of life in children with otitis media.

Author information

  • 1Department of Otorhinolaryngology-Head and Neck Surgery, University Hospital of Maastricht, The Netherlands. ATI@skno.azm.nl

Abstract

OBJECTIVES:

To validate the 6-item quality-of-life survey (OM-6) and to investigate response-shift bias regarding children with otitis media.

SETTING:

Otorhinolaryngology department of a university hospital that serves the southernmost part of the Netherlands.

PATIENTS:

Seventy-seven children (age range, 12-38 months) experiencing persistent otitis media with effusion and scheduled for placement of tympanostomy tubes.

SURVEY:

The OM-6 measures health-related quality of life in 6 domains: physical suffering, hearing loss, speech impairment, emotional distress, activity limitations, and caregiver concerns.

INTERVENTION:

Parents completed the OM-6 before surgery (pretest) and 6 weeks after surgery (posttest). At the posttest, parents also completed a retrospective version of the pretest (retrospective pretest).

RESULTS:

For most items, the test-retest reliability was good (R>0.8). The internal consistency of the OM-6 was satisfactory (alpha =.79). The construct validity, determined by correlating the ear-related global quality-of-life measure and the OM-6 summary score, was fair (R = -0.77, P<.01). Prospective change in quality of life on the OM-6 ranged from moderate (standardized response mean >/=0.5) to large (standardized response mean >/=0.8). Response-shift bias was present at the group level (t = -3.3, P<.01). Retrospective change was significant for hearing loss (z = -3.3, P<.05) and ear-related global quality of life (z = -3.6, P<.05).

CONCLUSIONS:

The validity of the OM-6 has been proved in a Dutch population. The data suggest that parents underestimate the seriousness of hearing loss and overestimate the quality of life of their child before surgery, indicating a response shift. Treatment results could lead parents to realize that the situation before surgery had been worse than they thought.

[PubMed - indexed for MEDLINE]
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