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Plaque psoriasis
Psoriasis Academy

Psoriasis Management

Read time: 70 mins
Last updated:6th Aug 2023
Published:6th Aug 2023

Psoriasis management

Burden of psoriasis

Psoriasis is a chronic inflammatory disease that affects approximately 2% of the population. In the majority of cases, people with psoriasis present with disfiguring, scaling, and erythematous plaques of the skin.

It is defined by the World Health Organisation as a chronic, non-communicable, painful, disfiguring, and disabling disease, for which there is no cure and with great negative impact on patients’ quality of life (QoL)1

Moderate-to-severe plaque psoriasis (with or without psoriatic arthritis) places significant social, physical and emotional burden on patients’ lives2,3. Despite treatment, many patients with psoriasis continue to experience clinical symptoms and impaired functioning4

With the significant impact on patient’s QoL, psoriasis impacts use of healthcare resources, associated costs, and work productivity5,6.

The visible disfiguration associated with psoriasis, particularly when on exposed areas of the body, leads to a significant psychological impact and reduction in QoL, which can include:

  • relationship difficulties
  • employment problems
  • low self-esteem
  • avoidance of social situations and isolation7,8

Patients have reported that itching/scratching, flaking/scaling and skin pain, had a significant impact on their social and emotional lives5.

Depression and anxiety in psoriasis

Psoriasis not only causes highly visible and painful physical symptoms, it is also strongly associated with psychological impairments9.

A UK primary care cohort study that assessed psychiatric morbidity and suicidal behaviour among 56,961 patients with psoriasis and 876,919 patients without psoriasis, found that patients with psoriasis had higher prevalence ratios for10

  • a history of alcohol misuse
  • bipolar disorder
  • depression
  • anxiety disorders
  • self-harm
  • psychotropic medication prescription

In addition to depression and anxiety, the psychological impact of psoriasis can include stress, sleep disturbances and disturbances in body image11

Results of a cross-sectional study of 107 patients with psoriasis in Germany indicated pruritus can induce significant burden and psychological morbidity11. In this study, participants with moderate/severe pruritus reported more QoL impairments, as well as depression, anxiety, body dysmorphic concerns and less treatment benefit, than those with none/mild pruritus11. However, in those with anogenital involvement, the intensity of pruritus played a less relevant role in the psychological impact of psoriasis. The authors suggested that this may be due to potential use of avoidance coping strategies in this population11.

Stigma and psoriasis

Stigmatisation can play an important role in the lives of people with visible skin diseases such as psoriasis, having a major impact on their daily activities, social life, work, QoL, and emotional and mental health12

While external stigmatisation is a result of negative reactions from others who hold false beliefs and prejudices about the disease, leading to social exclusion and isolation, stigma may also be internalised by individuals with psoriasis12. Through self-imposition of stereotypes and prejudices, this self-stigma can result in self-discrimination that may further compromise QoL.

In visible skin diseases such as psoriasis, disease severity and location/visibility are key drivers of stigma12. That is, the more visible the symptoms (particularly on the hands and face), the higher the impact and stigma12. The intensity of pruritus in people with psoriasis has also been positively associated with increased stigmatisation11

Impact of psoriasis on work productivity

The Corrona Psoriasis Registry is an independent, prospective, observational cohort launched in collaboration with the National Psoriasis Foundation. In a cross-sectional analysis of the registry, multivariable linear regression models showed that work productivity worsened with increasing disease severity3.

Compared with the mild psoriasis category, patients with moderate-to-severe psoriasis, as assessed by Investigator Global Assessment (IGA) scores, were significantly associated with poorer outcomes in the domains of ‘work hours missed,’ ‘impairment while working,’ and ‘work hours affected’ (all P<0.05),3 as shown in Figure 1.

Figure 1. Impact on Work Productivity and Activity Impairment (WPAI) domains by IGA severity group (Strober et al., 2019).

Figure 1. Impact on Work Productivity and Activity Impairment (WPAI) domains by Investigator Global Assessment (IGA) severity group (Adapted3).

Mortality and psoriasis

Numerous studies have reported the coexistence of psoriasis and other serious systemic diseases13. Growing evidence suggests that cardiovascular disease, obesity, diabetes, hypertension, dyslipidaemia, metabolic syndrome, non-alcoholic fatty liver disease (NAFLD), cancer, anxiety, depression, and inflammatory bowel disease, are found at a higher prevalence in patients with psoriasis compared to the general population13.

A systematic review and meta-analysis found the following pooled relative risks for all-cause mortality14:

  • 13 (95% CI 1.09–1.16) in mild psoriasis
  • 52 (95% CI 1.35–1.71) in severe psoriasis

The pooled relative risks for cardiovascular mortality were:

  • 05 (95% CI 0.92–1.20) in mild psoriasis
  • 38 (95% CI 1.09–1.74) in severe psoriasis

For non-cardiovascular causes, mortality risk from the following significantly increased in psoriasis patients, regardless of disease severity:

  • Liver disease 
  • Kidney disease
  • Infection

There was also a significantly increased mortality risk associated with neoplasms in people with severe psoriasis and chronic lower respiratory disease in all people with psoriasis14.

Measuring the burden of psoriasis – investigational approaches

Cumulative life course impairment (CLCI)

While some tools have been used to assess psoriasis-related impairment throughout a patient’s lifetime (such as the Major Life Changing Decision Profile [MCLDP] and Life Change Index), these measures are not necessarily dermatology-specific and do not capture the cumulative nature of impairment15.

The concept of cumulative life course impairment (CLCI) refers to the irreversible damage caused by persisting disease burden over time15

Risk factors for CLCI in patients with psoriasis include age, gender, disease duration and severity, early disease onset, systemic treatment, smoking, negative coping and comorbidities16.

Two investigational dermatology-specific measurement tools have been developed to assess CLCI in patients with a chronic skin disease15:

  • The DermCLCI-r, to measure persisting CLCI
  • The DermCLCI-p, to identify patients at risk for CLCI

These tools remain to be tested psychometrically for validity and reliability15. With further study and validation, they may become helpful tools in routine care to assess cumulative burden and identify patients for early treatment15.

Patient-reported impact of dermatological diseases (PRIDD) measure

Existing patient-reported outcome measures (PROMs) for dermatological conditions may not fully capture aspects of disease impact that are important to patients and have been developed with limited patient input17.

Drawing upon the input of 65 patients across 29 dermatological conditions, Pattinson and colleagues (2022) found the impact of dermatological conditions can affect physical, psychological, social and financial domains, as well as daily functioning and involvement of healthcare17. Using these findings as a basis, this group plans to co-construct a new PRIDD measure with patient input17.

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