Construct Validity of the Modified Numeric Rating Scale of Patient Global Assessment in Psoriatic Arthritis

Psoriatic arthritis (PsA) is a heterogeneous inflammatory arthritis with a varied clinical phenotype. There has been considerable international collaboration over recent years to develop and prioritise appropriate disease domains and outcome measures to capture all aspects of this complex disease. It has been recognised that patient-reported measures and physician assessments are complementary and, when used together, allow an improved reflection of disease burden. Taking this concept one step further, the experience in rheumatoid arthritis has demonstrated benefits of incorporating the patient perspective in the development of outcome measures. We report a systematic review demonstrating (1) that there has been little incorporation of the patient perspective in the development of outcome measures and domains in PsA, (2) the proceedings from the preliminary patient involvement in outcome measures for PsA (PIOMPSA) meetings, and (3) a proposed roadmap for improving patient involvement.

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“…Husted 1996 (5) 39 Husted 1996 40 Duffy 1992 41 46 Kwok 2010 31 Leung 2012 47 Dandorfer 2012 7 Peripheral joint activity…”

Section: Aimsmentioning

confidence: 99%

Patient Involvement in Outcome Measures for Psoriatic Arthritis

et al. 2014

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“…Additional important domains include enthesitis, dactylitis, fatigue, nail disease, spinal disease, acute‐phase reactant, and physician global assessment (PhGA). PtGA was found to be a reliable tool for assessing skin and joint disease activity among patients with PsA (). However, since the scores of the skin and joint often diverge, it was suggested that each of these domains should be scored separately ().…”

Section: Introductionmentioning

confidence: 99%

Factors Explaining the Discrepancy Between Physician and Patient Global Assessment of Joint and Skin Disease Activity in Psoriatic Arthritis Patients

Eder

Thavaneswaran

Chandran

et al. 2015

Arthritis Care & Research

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“…In the univariable analysis, we presented the Spearman's Rho correlations for variables with both PGA and PhGA; and the discordance (PGA‐PhGA). Based on previous studies, we hypothesized that PGA would have strong correlations with pain and physical function but moderate correlation with joint count . We also expected strong correlations to exist between PhGA and joint count.…”

Section: Methodsmentioning

confidence: 91%

“…Nonetheless, PGA‐PhGA did not seem to be related to follow‐up times in our sensitivity analysis. We did not assess PGA separately for skin vs arthritis, but from a previous study, PGA should represent more arthritis than skin, particularly in a cohort with low median PASI. Moreover, we did not collect data and therefore cannot account for chronic widespread pain syndromes and fibromyalgia which are well‐known to have large effects on pain and PGA, and theoretically may have less impact on PhGA.…”

Section: Discussionmentioning

confidence: 99%

Factors associated with patient‐physician discordance in a prospective cohort of patients with psoriatic arthritis: An Asian perspective

et al. 2019

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Objectives To evaluate factors associated with patient‐physician discordance in a multiethnic Asian cohort of psoriatic arthritis (PsA) patients. Methods We used data from a prospective cohort of consecutive patients with PsA fulfilling the Classification Criteria for Psoriatic Arthritis, recruited from a single center in Singapore. Sociodemographic, clinical data and patient‐reported outcomes were collected using a standardized protocol at baseline, 4 months, 8 months, 1 year, 2 years and 5 years. patient‐physician discordance was defined as patient global assessment minus physician global assessment (PGA‐PhGA). We evaluated variables associated with patient‐physician discordance using generalized linear regression to control for within‐subject effect. Results One hundred and fortytwo patients (51.4% male, 66.2% Chinese, mean [SD] age and duration of illness 51.1 [13.8] years and 27.5 [98.3] months) were recruited at baseline. Paired results for PGA and PhGA were available for 291 visits with median (interquartile range) follow‐up time of 11.6 (17) months. In univariable analysis, duration of illness, fatigue, pain, tender and swollen joint count, dactylitis count, and health‐related quality of life (Short Form‐36) domains were significantly correlated with patient‐physician discordance. In multivariable analysis, age, fatigue level, pain score were positively associated with patient‐physician discordance, while swollen joint count and mental health were negatively associated with patient physician discordance. Conclusions Increased age, higher fatigue levels, higher pain score and poorer mental health may explain underestimation of disease activity by physicians. Physicians’ overestimation of disease activity may be explained by higher swollen joint counts.

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Construct Validity of the Modified Numeric Rating Scale of Patient Global Assessment in Psoriatic Arthritis

Abstract: Judged on an NRS, the PGA had good construct validity and satisfactorily distinguished all levels of severity in PsA.

Cited by 17 publications

References 19 publications

Patient Involvement in Outcome Measures for Psoriatic Arthritis

Patient Involvement in Outcome Measures for Psoriatic Arthritis

Factors Explaining the Discrepancy Between Physician and Patient Global Assessment of Joint and Skin Disease Activity in Psoriatic Arthritis Patients

Factors associated with patient‐physician discordance in a prospective cohort of patients with psoriatic arthritis: An Asian perspective

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