Evaluation of responsiveness and estimation of smallest detectable change and minimal important change scores for the Childhood Atopic Dermatitis Impact Scale

Measurement properties of quality-of-life outcome measures for children and adults with eczema: A systematic review update 2.0

A systematic review on measurement properties of patient-reported outcome measures (PROMs) for the assessment of quality of life (QoL) in children and adults with eczema was published in 2016 and updated in 2019. We now aimed to systematically assess the measurement properties of PROMs based on recently published development and validation studies regarding quality-of-life skin- or disease-specific PROMs using the COnsensus-based Standards for the selection of health Measurement Instruments (COSMIN) guidelines and integrate these findings with those from the 2019 update. A systematic literature search was conducted in PubMed and Embase. Eligible studies reported on measurement properties of QoL skin- or disease-specific PROMs for the assessment of QoL in children and adults with eczema. The methodological quality of the included studies was evaluated using the COSMIN Risk of Bias checklist. The methodological quality of the included PROMs was judged using updated criteria for good measurement properties, and the quality of evidence was graded. The new evidence was integrated into the results from the 2019 update. Finally, a recommendation for use of the identified PROMs was derived based on all evidence. We identified 12 studies fulfilling our inclusion criteria. Based on the newly generated evidence, the Childhood Atopic Dermatitis Impact Scale-short form (CADIS-SF) for infants and the Skindex for adults can be recommended for use. We identified three new PROMs, which have the potential to be used, but require further validation: the Pediatric Allergic Disease Quality of Life Questionnaire (PADQLQ), the Skindex-Mini, and the Scratch Intensity and Impact Scale (SIIS). All other assessed PROMs still have the opportunity to be recommended for use (except for the Dermatology Life Quality Index (DLQI)) but need further validation. Currently, two PROMs for the assessment of QoL in eczema can be recommended for use: the CADIS-SF for infants and the Skindex for adults. Many PROMs, including the recently developed and/or validated PROMs PADQLQ, Skindex-Mini and SIIS, need further validation.

Differences in Psychometric Properties of Clinician- and Patient-Reported Outcome Measures for Atopic Dermatitis by Race and Skin Tone: A Systematic Review

The psychometric validity and reliability of widely used atopic dermatitis (AD) outcome measures across different races and ethnicities are unclear. We describe the rates of reporting race, ethnicity, and skin tone in studies testing the psychometric properties of AD outcome measures and compare the psychometric analyses across race, ethnicity, and skin tone. We systematically reviewed MEDLINE and EMBASE for studies reporting psychometric properties of clinician-reported or patient-reported outcome measures in AD (International Prospective Register of Systematic Reviews: CRD42021239614). Overall, 16,100 nonduplicate articles were screened; 165 met inclusion criteria. Race and/or ethnicity were reported in 55 (33.3%) studies; of those, race was assessed by self-report in 10 studies (6.1%) or was unspecified in 45 (27.3%). A total of 16 studies (9.7%) evaluated psychometric property differences by race, and only five (4.4%) of those did not recognize it as a limitation. Properties assessed across race, ethnicity, or skin tone were differential item functioning, convergent validity feasibility, inter-rater reliability, intrarater reliability, test‒retest reliability, and known-groups validity. Multiple instruments demonstrated performance differences across ethnoracial groups. This review highlights the paucity of race/ethnicity consideration for psychometric property testing in AD outcome measurement instruments. More AD outcomes instruments should be validated in diverse populations.

Understanding characteristics of patients newly initiating ixekizumab: findings from the Corrona Psoriasis Registry

Background: Real-world data on patients newly initiating ixekizumab is limited. Our study describes the characteristics of patients who initiated ixekizumab and other biologics for psoriasis treatment in North American dermatological practices. Materials & methods: Characteristics of patients ascertained at registry enrollment are described via means and frequencies. Results: Compared with other biologic initiators, ixekizumab initiators had: longer disease duration (17.1 vs 15.1 years); more were considered least severe by body surface area (33 vs 26%); moderate-to-severe by IGA (56 vs 48%); were biologic-experienced (80 vs 52%); obese (54 vs 47%); and experienced greater impact in work productivity (5.3 vs 2.9%) versus other biologic initiators. Conclusion: Psoriasis patients initiating ixekizumab had more severe disease, biologic experience, and worse patient-reported outcomes than those initiating other biologics.