Objective: To assess the level of knowledge in a group of patients with psoriatic arthritis (PsA) following one reading of an information leaflet [UK Arthritis Rheumatism Council (ARC) booklet] using a validated self-administered questionnaire. Comparisons with subsets of the disease and level of general education were also made.
Methods: A multiple choice self-administered questionnaire was carried out in a group of 59 patients (32 male, 27 female, mean age 47.53 +/- 12.71 yrs) with established disease (mean duration 9.6 +/- 8.5 yrs). The questionnaire covered 4 broad areas of the disease (general knowledge of skin and joint disease, etiology, symptoms, blood test; general management and drug therapy; physiotherapy treatments; joint protection and priorities) and it was written collecting the majority of the information from an ARC booklet on PsA and from advice from the rheumatology team. Detailed statistical analysis was performed to validate the questionnaire and to measure any associations with demographic data.
Results: The questionnaire was consistent, reliable, and easy to read. Patients showed a lack of knowledge with some erroneous beliefs about their disease (i.e., causes, blood tests, longterm drugs). No statistical associations were found between the level of knowledge achieved and demographic data and patterns of disease. A significant association was found between the median score and level of general education (Kruskal-Wallis analysis of variance 7.97, p = 0.02).
Conclusion: The questionnaire is a good instrument to assess knowledge in PsA. The ARC booklet alone seems inadequate to provide sufficient knowledge of disease. Patients' erroneous beliefs were highlighted and these should be addressed.