Tele-assessment of Psoriasis Area and Severity Index: A study of the accuracy of digital image capture

Singh, Philip, Soyer, H. Peter, Wu, Jason, Salmhofer, Wolfgang and Gilmore, Stephen (2011) Tele-assessment of Psoriasis Area and Severity Index: A study of the accuracy of digital image capture. Australasian Journal of Dermatology, 52 4: 259-263. doi:10.1111/j.1440-0960.2011.00800.x


Author Singh, Philip
Soyer, H. Peter
Wu, Jason
Salmhofer, Wolfgang
Gilmore, Stephen
Title Tele-assessment of Psoriasis Area and Severity Index: A study of the accuracy of digital image capture
Journal name Australasian Journal of Dermatology   Check publisher's open access policy
ISSN 0004-8380
1440-0960
Publication date 2011-01-01
Sub-type Article (original research)
DOI 10.1111/j.1440-0960.2011.00800.x
Volume 52
Issue 4
Start page 259
End page 263
Total pages 5
Place of publication Richmond, Vic, Australia
Publisher Wiley-Blackwell
Language eng
Formatted abstract
Background: The implementation of remote Psoriasis Area and Severity Index (PASI) determinations would greatly enhance the delivery of specialist dermatological care to patients with severe psoriasis unable to attend face-to-face dermatological consultations. Here we investigate the feasibility of the remote determination of PASI scores by comparing the results of face-to-face with digital image assessment.

Methods: Twelve patients with confirmed psoriasis were recruited for the study. Initially, two dermatologists scored the PASI at the patients’ usual scheduled face-to-face visits, at which time standardized digital images were obtained. PASI scoring based on digital images was then performed on two separate occasions
by three dermatologists with a time-interval period between assessments, facilitating an assessment of score reproducibility. Linear weighted kappa statistics were applied to the PASI scores to ascertain agreement between sets of observations.

Results: While we found a moderate (k = 0.51) agreement between the face-to-face scores, there was very good (k = 0.83) agreement between the first round of telescores and moderate (k = 0.60) agreement between the second round of telescores. Comparison between the face-to-face and telescores revealed good (k = 0.67 and 0.63) agreement for the scorers respectively.

Conclusion
: We demonstrate that PASI scores can be determined with moderate to good accuracy by dermatologists using standardized digital images. Our results imply the implementation of a tele-PASI service may be a practical and effective adjunct to the dermatological care of patients with severe psoriasis where incapacity or distance prevent the realisation of face-to-face consultations.
Keyword Dermatology
PASI
Psoriasis
Teledermatology
Telemedicine
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Medicine Publications
 
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Created: Thu, 24 Nov 2011, 21:01:37 EST by Nicole Lin on behalf of Medicine - Princess Alexandra Hospital