1. The Psychometric Properties of the Psoriasis Disability Index in United States Patients 
Tamar Nijsten, Diane Whalley, Joel Gelfand, David Margolis, Stephen P. McKenna, Robert S. Stern 
Journal of Investigative Dermatology 
Volume 125, Issue 4, Pages (October 2005)
DOI: /j X x
Copyright © 2005 The Society for Investigative Dermatology, Inc Terms and Conditions

2. Figure 1
Distribution of response to each of the items of the Psoriasis Disability Index.
Journal of Investigative Dermatology  , DOI: ( /j X x)
Copyright © 2005 The Society for Investigative Dermatology, Inc Terms and Conditions

3. Figure 2
Box plots of the Psoriasis Disability Index score stratified to (A) problem in everyday life score and (B) extent of disease.
Journal of Investigative Dermatology  , DOI: ( /j X x)
Copyright © 2005 The Society for Investigative Dermatology, Inc Terms and Conditions