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 665-672 (October 2005) DOI: 10.1111/j.0022-202X.2005.23775.x Copyright © 2005 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 1 Distribution of response to each of the items of the Psoriasis Disability Index. Journal of Investigative Dermatology 2005 125, 665-672DOI: (10.1111/j.0022-202X.2005.23775.x) Copyright © 2005 The Society for Investigative Dermatology, Inc Terms and Conditions

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 2005 125, 665-672DOI: (10.1111/j.0022-202X.2005.23775.x) Copyright © 2005 The Society for Investigative Dermatology, Inc Terms and Conditions