Psychometric testing of the revised 15-item bakas caregiving outcomes scale

Tamilyn Bakas, Victoria Champion, Susan Perkins, Carol J. Farran, Linda Williams

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

BACKGROUND:: Family caregivers of stroke survivors experience a variety of negative social, emotional, and health-related outcomes as a result of providing care. OBJECTIVES:: To psychometrically test the revised 15-item Bakas Caregiving Outcomes Scale (BCOS) measuring life changes specifically resulting from providing care. The original 10-item BCOS was improved by adding five items addressing financial well-being, level of energy, role functioning, physical functioning, and general health. METHODS:: Psychometric testing of the revised 15-item BCOS using a sample of 147 family caregivers of stroke survivors approximately 4 months after stroke was conducted to determine the quality of the items, internal consistency reliability, test-retest reliability, construct validity, and criterion-related validity. Most caregivers were women (78.9%), White (68.0%) or African American (29.9%), and either spouses (60.1%) or adult children (31.3%). RESULTS:: Satisfactory evidence of internal consistency (α = .90) and 2-week test-retest reliability (intraclass coefficient [ICC] ≤ .66; 95% confidence interval [CI] ≤ 0.42-0.81) was provided, with item-to-total correlations ranging from .41 to .74. Unidimensionality was supported by confirmatory factor analysis with indices, indicating a good fit. Using hierarchical multiple regression, 36% of the BCOS variance was explained by constructs in the conceptual model [F(11,132) ≤ 6.72, p < .001]. Criterion-related validity was supported by correlations with the 36-item Short Form (SF-36) General Health Subscale (r ≤ .32, p < .001) and a criterion variable measuring how caregivers' lives had changed overall (r ≤ .67, p < .001). DISCUSSION:: The revised 15-item BCOS has evidence of satisfactory reliability and validity in family caregivers of stroke survivors. The BCOS is a valuable measure in research and can be used to identify priority areas for nursing interventions designed to improve caregivers' outcomes.

Original languageEnglish
Pages (from-to)346-355
Number of pages10
JournalNursing Research
Volume55
Issue number5
DOIs
StatePublished - Sep 2006

Fingerprint

Psychometrics
Caregivers
Reproducibility of Results
Stroke
Survivors
Health
Adult Children
Spouses
African Americans
Statistical Factor Analysis
Nursing
Confidence Intervals
Research

Keywords

  • Caregivers
  • Instrumentation
  • Outcomes
  • Stroke

ASJC Scopus subject areas

  • Nursing(all)

Cite this

Psychometric testing of the revised 15-item bakas caregiving outcomes scale. / Bakas, Tamilyn; Champion, Victoria; Perkins, Susan; Farran, Carol J.; Williams, Linda.

In: Nursing Research, Vol. 55, No. 5, 09.2006, p. 346-355.

Research output: Contribution to journalArticle

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abstract = "BACKGROUND:: Family caregivers of stroke survivors experience a variety of negative social, emotional, and health-related outcomes as a result of providing care. OBJECTIVES:: To psychometrically test the revised 15-item Bakas Caregiving Outcomes Scale (BCOS) measuring life changes specifically resulting from providing care. The original 10-item BCOS was improved by adding five items addressing financial well-being, level of energy, role functioning, physical functioning, and general health. METHODS:: Psychometric testing of the revised 15-item BCOS using a sample of 147 family caregivers of stroke survivors approximately 4 months after stroke was conducted to determine the quality of the items, internal consistency reliability, test-retest reliability, construct validity, and criterion-related validity. Most caregivers were women (78.9{\%}), White (68.0{\%}) or African American (29.9{\%}), and either spouses (60.1{\%}) or adult children (31.3{\%}). RESULTS:: Satisfactory evidence of internal consistency (α = .90) and 2-week test-retest reliability (intraclass coefficient [ICC] ≤ .66; 95{\%} confidence interval [CI] ≤ 0.42-0.81) was provided, with item-to-total correlations ranging from .41 to .74. Unidimensionality was supported by confirmatory factor analysis with indices, indicating a good fit. Using hierarchical multiple regression, 36{\%} of the BCOS variance was explained by constructs in the conceptual model [F(11,132) ≤ 6.72, p < .001]. Criterion-related validity was supported by correlations with the 36-item Short Form (SF-36) General Health Subscale (r ≤ .32, p < .001) and a criterion variable measuring how caregivers' lives had changed overall (r ≤ .67, p < .001). DISCUSSION:: The revised 15-item BCOS has evidence of satisfactory reliability and validity in family caregivers of stroke survivors. The BCOS is a valuable measure in research and can be used to identify priority areas for nursing interventions designed to improve caregivers' outcomes.",
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