COSMIN database

Quality appraisal of generic self-reported instruments measuring health-related productivity changes: a systematic review

Authors:
Noben, C. Y., Evers, S. M., Nijhuis, F. J., and de Rijk, A. E.
Abstract:
BACKGROUND: Health impairments can result in disability and changed work productivity imposing considerable costs for the employee, employer and society as a whole. A large number of instruments exist to measure health-related productivity changes; however their methodological quality remains unclear. This systematic review critically appraised the measurement properties in generic self-reported instruments that measure health-related productivity changes to recommend appropriate instruments for use in occupational and economic health practice.

METHODS: PubMed, PsycINFO, Econlit and Embase were systematically searched for studies whereof: (i) instruments measured health-related productivity changes; (ii) the aim was to evaluate instrument measurement properties; (iii) instruments were generic; (iv) ratings were self-reported; (v) full-texts were available. Next, methodological quality appraisal was based on COSMIN elements: (i) internal consistency; (ii) reliability; (iii) measurement error; (iv) content validity; (v) structural validity; (vi) hypotheses testing; (vii) cross-cultural validity; (viii) criterion validity; and (ix) responsiveness. Recommendations are based on evidence syntheses.

RESULTS: This review included 25 articles assessing the reliability, validity and responsiveness of 15 different generic self-reported instruments measuring health-related productivity changes. Most studies evaluated criterion validity, none evaluated cross-cultural validity and information on measurement error is lacking. The Work Limitation Questionnaire (WLQ) was most frequently evaluated with moderate respectively strong positive evidence for content and structural validity and negative evidence for reliability, hypothesis testing and responsiveness. Less frequently evaluated, the Stanford Presenteeism Scale (SPS) showed strong positive evidence for internal consistency and structural validity, and moderate positive evidence for hypotheses testing and criterion validity. The Productivity and Disease Questionnaire (PRODISQ) yielded strong positive evidence for content validity, evidence for other properties is lacking. The other instruments resulted in mostly fair-to-poor quality ratings with limited evidence.

CONCLUSIONS: Decisions based on the content of the instrument, usage purpose, target country and population, and available evidence are recommended. Until high-quality studies are in place to accurately assess the measurement properties of the currently available instruments, the WLQ and, in a Dutch context, the PRODISQ are cautiously preferred based on its strong positive evidence for content validity. Based on its strong positive evidence for internal consistency and structural validity, the SPS is cautiously recommended.
DOI:
10.1186/1471-2458-14-115
URL:
https://www.ncbi.nlm.nih.gov/pubmed/24495301
Journal:
BMC Public Health
issn:
1471-2458 (Electronic)
Publication year:
2014
pages:
115
General health perceptions / HRQoL:
Health-related quality of life
Age:
Adults (18-65)
Seniors (65+)
Disease:
Certain conditions originating in the perinatal period and related symptoms
Certain infections and parasitic diseases and related symptoms
Congenital malformations, deformations and chromosomal abnormalities and related symptoms
Diseases of and symptoms related to the blood and blood-forming organs and certain disorders involving the immune mechanism
Diseases of and symptoms related to the circulatory system
Diseases of and symptoms related to the digestive system
Diseases of and symptoms related to the ear and mastoid process
Diseases of and symptoms related to the eye and adnexa
Diseases of and symptoms related to the genitourinary system
Diseases of and symptoms related to the musculoskeletal system and connective tissue
Diseases of and symptoms related to the nervous system
Diseases of and symptoms related to the respiratory system
Diseases of and symptoms related to the skin and subcutaneous tissue
Endocrine, nutritional and metabolic diseases and related symptoms
External causes of morbidity and mortality
Injury, poisoning and certain other consequences of external causes
Mental and behavioural disorders and related symptoms
Neoplasms and related symptoms
Pregnancy, childbirth and puerperium and related symptom
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
PRO / non-PRO:
Patient Reported Outcome
Type of measurement instrument:
1 - Questionnaires
6 - Clinical rating scales