Update information September 2017: The guideline has been revised throughout to link to MHRA advice and NICE technology appraisals that have been completed since original publication. Minor updates since publication August 2019: Links to the MHRA safety advice on the risk of using retinoids in pregnancy have been updated to the June 2019 version.
Psoriasis is a complex long-term condition that can make substantial physical and psychological demands on the patient107. Over a third of people with psoriasis report clinically significant anxiety and depression and levels of suicide ideation are increased in psoriasis. Less is known about actual suicide attempts.
Social embarrassment and rejection are common and this psychological and social impact results in reduced quality of life and lower levels of psychological wellbeing. The magnitude of impact on quality of life for people with psoriasis is thought to be similar to other long term conditions such as diabetes, cancer and cardio-vascular disease. Cross-sectional work has shown that distress affects clinical outcomes possibly through behavioural and biological pathways, reducing coping, impairing self-care and increasing non-adherence, this latter finding is particularly relevant to use of topical treatments in psoriasis. Furthermore, some studies suggest distress may actually trigger a psoriasis flare.
High levels of distress and poor coping are underpinned by a set of beliefs that are both general - about the person themselves, and their ability to manage a long-term condition, plus specific beliefs about the condition itself. These beliefs are useful predictors of self-management and form important targets for psychological treatment intervention designed to challenge and change them.
The NICE clinical guideline on depression263 in adults includes recommendations on the use of cognitive behaviour therapy (CBT) for patients with low mood and depression and a long-term physical condition.
Access to psychological therapies has been, and continues to be, problematic as demand outstrips supply with many eligible patients waiting for long periods to access suitably trained therapists. Dedicated psychological service provision for patients with psoriasis only exists in highly specialised settings. More often, patients are referred to general mental health services and assessed according to standard mental illness criteria and therefore psoriasis specific issues may be missed. Patients are often reluctant to use mental health services partly due to the social embarrassment they experience living with psoriasis and partly because non-specialists do not understand or address key aspects of the condition sufficiently for them.
The GDG posed the following question: in people with psoriasis (all types), how effective are cognitive behavioural therapy (CBT) (group and individual) interventions, alone or as an adjunct to standard care, compared with standard care alone for managing psychological aspects of the disease in reducing distress and improving quality of life?
14.1. Methodological introduction
A literature search was conducted for RCTs, systematic reviews or comparative observational studies that addressed the efficacy of cognitive behavioural therapy in people with psoriasis for managing the psychological aspects of the condition compared with standard care (the pharmacological intervention usually received by a person with psoriasis of a given severity and/or educational interventions). Note that CBT was prioritised for review because it has been studied with more rigor than other psychological interventions in psoriasis.
No time limit was placed on the literature search and there were no limitations on sample size or duration of follow-up. Indirect populations were excluded.
The outcomes considered were:
- Reduced distress, anxiety or depression (assed by change in Hospital Anxiety and Depression Scale (HADS), Beck Depression Inventory (BDI) or Speilberger State Trait Anxiety Inventory (STAI))
- Reduced stress (change in Psoriasis Life Stress Inventory [PLSI])
- Improved quality of life (change in Dermatology Life Quality Index [DLQI] or Psoriasis Disability Index [PDI])
- Reduced psoriasis severity (change in PASI).
One study106, was found that addressed the question and was included in the review. Note that no studies were available that assessed cognitive behavioural therapy in an exclusively paediatric population.
The study design used patient-preference randomization and so was classified as a non-randomised controlled study. The intervention was a 6-session CBT programme delivered by medical, clinical psychology, and nursing personnel, called the Psoriasis Symptom Management Programme (PSMP), which lasted 2.5 hours. This consisted of didactic teaching about the medical and biological basis of psoriasis, stress-reduction techniques, cognitive techniques and homework in relation to individual perceptions as an adjunct to standard care. The comparison group received standard care, which included topical and systemic non-biological therapy.
14.2. Cognitive behavioural therapy vs. standard care
14.2.1. Evidence profile
Although the t-values and p-values reported in the GRADE table were unadjusted for confounders, the study did report the results of repeated-measures ANCOVA with baseline scores included as covariates. This analysis was reported to show statistically significant effects of the intervention compared with standard treatment for PASI (p=0.001), anxiety (p=0.001), depression (p=0.001), psoriasis-related stress (p=0.001) and disability (p=0.04). However, it was not clear whether this was based on the 6 week or 6 month time-point or whether it was for a comparison of final or change scores.
The study did not report full details for the majority of outcomes, which were mainly presented graphically only. However, to aid clinical interpretation the available data are presented below to provide contextual information about the approximate magnitude of change in both groups relative to baseline values (see Table 168). Note that the study did not report mean scores as assessed by Psoriasis Disability Index or the depression scores from HADS.
14.2.2. Evidence statements
In people with psoriasis, the cognitive behavioural therapy group had a significantly lower mean score than standard care (P<0.05) for:
- PASI75 at 6 months [1 study; 58 participants; very low quality evidence]106
- Final PASI at 6 weeks [1 study; 93 participants; very low quality evidence]106
- Clinical severity as measured by PASI at 6 months [1 study; 93 participants; very low quality evidence]106
- Disability as measured by PDI at 6 weeks and 6 months [1 study; 93 participants; very low quality evidence]106
- Depression as measured by HADS at 6 weeks and 6 months [1 study; 93 participants; very low quality evidence]106
- Anxiety as measured by HADS at 6 weeks and 6 months [1 study; 93 participants; very low quality evidence]106
- Stress as measured by PLSI at 6 weeks and 6 months [1 study; 93 participants; very low quality evidence]106
14.3. Economic evidence
No relevant economic evidence was identified.
14.4. Recommendations and link to evidence
Publication Details
Copyright
Apart from any fair dealing for the purposes of research or private study, criticism or review, as permitted under the Copyright, Designs and Patents Act, 1988, no part of this publication may be reproduced, stored or transmitted in any form or by any means, without the prior written permission of the publisher or, in the case of reprographic reproduction, in accordance with the terms of licences issued by the Copyright Licensing Agency in the UK. Enquiries concerning reproduction outside the terms stated here should be sent to the publisher at the UK address printed on this page.
The use of registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant laws and regulations and therefore for general use.
The rights of National Clinical Guideline Centre to be identified as Author of this work have been asserted by them in accordance with the Copyright, Designs and Patents Act, 1988.
Publisher
Royal College of Physicians (UK), London
NLM Citation
National Clinical Guideline Centre (UK). Psoriasis: Assessment and Management of Psoriasis. London: Royal College of Physicians (UK); 2012 Oct. (NICE Clinical Guidelines, No. 153.) 14, Cognitive behavioural therapy.