Construct validity of the work productivity and activity impairment questionnaire across informal caregivers of chronically Ill older patients

Erin R. Giovannetti, Jennifer Wolff, Kevin Frick, Chad Boult

Research output: Contribution to journalArticle

Abstract

Objectives: To assess the validity of the Work Productivity and Activity Impairment questionnaire as adapted for caregiving (WPAI:CG) to measure productivity loss (hours missed from work, impairment while at work, and impairment in regular activities) due to unpaid caregiving for medically complex older adults. Methods: The WPAI:CG was administered along with the Caregiver Strain Index (CSI) and Center for Epidemiologic Studies Depression Scale (CESD) to a caregiving population (N = 308) enrolled with their older, medically complex care-recipient in a cluster-randomized controlled study. Correlation coefficients were calculated between each productivity variable derived from the WPAI:CG and CSI/CESD scores. Nonparametric tests for trend across ordered groups were carried out to examine the relationship between each productivity variable and the intensity of the caregiving. Results: Significant positive correlations were found between work productivity loss and caregiving-related strain (r = 0.45) and depression (r = 0.30). Measures of productivity loss were also highly associated with caregiving intensity (P <0.05) and care-recipient medical care use (P <0.05). The average employed caregiver reported 1.5 hours absence from work in the previous week and 18.5% reduced productivity while at work due to caregiving. Employed and nonemployed caregivers reported 27.2% reduced productivity in regular activities in the previous week. Conclusion: The results indicate high convergent validity of the WPAI:CG questionnaire. This measure could facilitate research on the cost-effectiveness of caregiver-workplace interventions and provide employers and policy experts with a more accurate and comprehensive estimate of caregiving-related costs incurred by employers and society.

Original languageEnglish (US)
Pages (from-to)1011-1017
Number of pages7
JournalValue in Health
Volume12
Issue number6
DOIs
StatePublished - Sep 2009

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Caregivers
Chronic Disease
Epidemiologic Studies
Workplace
Cost-Benefit Analysis
Surveys and Questionnaires
Costs and Cost Analysis
Research
Population

Keywords

  • Absenteeism
  • Activities of daily living
  • Caregiving
  • Productivity
  • Quality of life
  • Validity

ASJC Scopus subject areas

  • Health Policy
  • Public Health, Environmental and Occupational Health

Cite this

Construct validity of the work productivity and activity impairment questionnaire across informal caregivers of chronically Ill older patients. / Giovannetti, Erin R.; Wolff, Jennifer; Frick, Kevin; Boult, Chad.

In: Value in Health, Vol. 12, No. 6, 09.2009, p. 1011-1017.

Research output: Contribution to journalArticle

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