Episodic disability questionnaire (EDQ) measurement properties among adults living with HIV in Canada, Ireland, United Kingdom, and United States

Background: The Episodic Disability Questionnaire (EDQ) is a generic 35-item patient-reported outcome measure of presence, severity and episodic nature of disability. We assessed the measurement properties of the Episodic Disability Questionnaire (EDQ) with adults living with HIV. Methods: We conducted a measurement study with adults living with HIV in eight clinical settings in Canada, Ireland, United Kingdom, and United States. We electronically administered the EDQ followed by three reference measures (World Health Organization Disability Assessment Schedule; Patient Health Questionnaire; Social Support Scale) and a demographic questionnaire. We administered the EDQ only 1 week later. We assessed the internal consistency reliability (Cronbach’s alpha; > 0.7 acceptable), and test–retest reliability (Intra Class Correlation Coefficient; > 0.7 acceptable). We estimated required change in EDQ domain scores to be 95% certain that a change was not due to measurement error (Minimum Detectable Change (MDC95%)). We evaluated construct validity by assessing 36 primary hypotheses of relationships between EDQ scores and scores on the reference measures (> 75% hypotheses confirmed indicated validity).Results: Three hundred fifty nine participants completed the questionnaires at time point 1, of which 321 (89%) completed the EDQ approximately 1 week later. Cronbach’s alpha for internal consistency ranged from 0.84 (social domain) to 0.91 (day domain) for the EDQ severity scale, and 0.72 (uncertainty domain) to 0.88 (day domain) for the EDQ presence scale, and 0.87 (physical, cognitive, mental-emotional domains) to 0.89 (uncertainty domain) for the EDQ episodic scale. ICCs for test–retest reliability ranged from 0.79 (physical domain) to 0.88 (day domain) for the EDQ severity scale and from 0.71 (uncertainty domain) to 0.85 (day domain) for the EDQ presence scale. Highest precision was demonstrated in the severity scale for each domain (MDC95% range: 19–25 out of 100), followed by the presence (MDC95% range: 37–54) and episodic scales (MDC95% range:44–76). Twenty-nine of 36 (81%) construct validity hypotheses were confirmed. Conclusions: The EDQ possesses internal consistency reliability, construct validity, and test–retest reliability, with limited precision when administered electronically with adults living with HIV across in clinical settings in four countries. Given the measurement properties, the EDQ can be used for group level comparisons for research and program evaluation in adults living with HIV.</p

Short-Form HIV disability questionnaire sensibility, utility, and implementation considerations in community-based settings: a mixed methods study

Purpose: We assessed the sensibility, utility, and implementation considerations of the Short-Form HIV Disability Questionnaire (SF-HDQ) in community-based settings. Methods: We conducted a mixed-methods study with adults living with HIV and community providers in seven community sites in Canada. We administered the SF-HDQ, a sensibility questionnaire and conducted semi-structured interviews. The SF-HDQ was sensible if median scores were ≥5/7(adults living with HIV) and ≥4/7(community providers) for ≥80% of the sensibility questionnaire items. Qualitative interview data were analyzed using content analysis. Results: Median sensibility scores were ≥5 for adults living with HIV (n = 44) and ≥4 for community providers (n = 10) for 95% and 100% of items, respectively. The SF-HDQ is comprehensive, represented disability, captured its episodic nature, and was easy to complete. Community utility included: facilitating communication and engagement with community; taking a snapshot of disability and tracking changes over time; guiding referrals; fostering self-reflection; and informing community programs. Considerations for implementation included flexible, person-centered approaches to mode and processes of administration, and communicating scores based on personal preferences among persons living with HIV. Conclusion: The SF-HDQ possesses sensibility and utility for use in community-based settings.</p