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Construct validity of the Impact of Weight on Quality of Life Questionnaire.

Publication ,  Journal Article
Kolotkin, RL; Head, S; Brookhart, A
Published in: Obes Res
September 1997

The Impact of Weight on Quality of Life questionnaire (IWQOL) is a 74-item self-report, condition-specific instrument that (1) assesses the effect of weight on quality of life in eight key areas, and (2) may be used as a treatment outcome measure and/or an evaluation tool for healthcare policy makers and third-party payers. This study explores IWQOL construct validity and provides new information on internal consistency, treatment effects, and differences between men and women. IWQOL total scores correlated highly with other measures of overall quality of life, and subscale scores correlated well with counterparts in the assessment battery. Internal consistency estimates for the IWQOL scales generally were high. For the women, 4-week participants, and the total sample, pretreatment-posttreatment differences were significant for all IWQOL scales and total score. For men, treatment differences were significant for the total score and all subscales except for Work and Mobility. Treatment differences for 2-week participants were significant for all scales except for Work. Consistent with previous IWQOL study results, the Comfort With Food scale scores reflected more discomfort at posttreatment as compared with pretreatment. The IWQOL, already translated into French and Italian, currently is demonstrating clinical and research utility as a quality-of-life outcome measure for clinical trials of antiobesity drugs and surgical treatments for patients with obesity.

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Published In

Obes Res

DOI

ISSN

1071-7323

Publication Date

September 1997

Volume

5

Issue

5

Start / End Page

434 / 441

Location

United States

Related Subject Headings

  • Surveys and Questionnaires
  • Sexuality
  • Self Concept
  • Quality of Life
  • Obesity
  • Middle Aged
  • Male
  • Interpersonal Relations
  • Humans
  • Health Status
 

Citation

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Kolotkin, R. L., Head, S., & Brookhart, A. (1997). Construct validity of the Impact of Weight on Quality of Life Questionnaire. Obes Res, 5(5), 434–441. https://doi.org/10.1002/j.1550-8528.1997.tb00667.x
Kolotkin, R. L., S. Head, and A. Brookhart. “Construct validity of the Impact of Weight on Quality of Life Questionnaire.Obes Res 5, no. 5 (September 1997): 434–41. https://doi.org/10.1002/j.1550-8528.1997.tb00667.x.
Kolotkin RL, Head S, Brookhart A. Construct validity of the Impact of Weight on Quality of Life Questionnaire. Obes Res. 1997 Sep;5(5):434–41.
Kolotkin, R. L., et al. “Construct validity of the Impact of Weight on Quality of Life Questionnaire.Obes Res, vol. 5, no. 5, Sept. 1997, pp. 434–41. Pubmed, doi:10.1002/j.1550-8528.1997.tb00667.x.
Kolotkin RL, Head S, Brookhart A. Construct validity of the Impact of Weight on Quality of Life Questionnaire. Obes Res. 1997 Sep;5(5):434–441.

Published In

Obes Res

DOI

ISSN

1071-7323

Publication Date

September 1997

Volume

5

Issue

5

Start / End Page

434 / 441

Location

United States

Related Subject Headings

  • Surveys and Questionnaires
  • Sexuality
  • Self Concept
  • Quality of Life
  • Obesity
  • Middle Aged
  • Male
  • Interpersonal Relations
  • Humans
  • Health Status