Skin Diseases in Patients with Primary Psychiatric Disorders

Resting-state fMRI reveals changes within the anxiety and social avoidance circuitry of the brain in mice with psoriasis-like skin lesions

Psoriasis is an autoimmune skin disease that often co-occurs with psychological morbidities such as anxiety and depression, and psychosocial issues also lead psoriasis patients to avoid other people. However, the precise mechanism underlying the comorbidity of psoriasis and anxiety is unknown. Also, whether the social avoidance phenomenon seen in human patients also exists in psoriasis-like animal models remains unknown. In the present study, anxiety-like behaviours and social avoidance-like behaviours were observed in an imiquimod-induced psoriasis-like C57-BL6 mouse model along with typical psoriasis-like dermatitis and itch-like behaviours. The 11.7T resting-state functional magnetic resonance imaging showed differences in brain regions between the model and control group, and voxel-based morphometry showed that the grey matter volume changed in the basal forebrain region, anterior commissure intrabulbar and striatum in the psoriasis-like mice. Seed-based resting state functional connectivity analysis revealed connectivity changes in the amygdala, periaqueductal gray, raphe nuclei and lateral septum. We conclude that the imiquimod-induced psoriasis-like C57-BL6 mouse model is well suited for mechanistic studies and for performing preclinical therapeutic trials for treating anxiety and pathological social avoidance in psoriasis patients.

Psychodermatological Disorders in Patients With Primary Psychiatric Conditions: Cross-Sectional Study

BACKGROUND

Psychodermatological disorders (PDs) and their associations with mental health problems are one of the most frequent research themes in dermatology outpatient settings. Surprisingly, very few studies have been conducted to evaluate PDs among patients with primary psychiatric conditions. As such, the relationship between preexisting psychiatric conditions and comorbid PDs is underrepresented in the literature.

OBJECTIVE

This study examined the prevalence and distribution of PDs among adults with primary psychiatric conditions and determined their association with underlying psychiatric diagnoses.

METHODS

We conducted a cross-sectional analysis at a tertiary health care facility in southwestern Nigeria. Comorbid PDs were identified and classified using preexisting classification systems. A bivariate analysis was conducted to determine the association between PDs and underlying psychiatric conditions. The level of statistical significance was set at P<.05.

RESULTS

The study included 107 patients with mental health disorders, of whom 64 (59.8%) were female. The mean age of the patients was 40.73 (SD 13.08) years. A total of 75 (75/107, 70%) patients had at least one comorbid PD. The prevalence of PDs was highest in patients with affective disorders (15/20, 75%) and least in those with schizophrenia (45/66, 68%). PDs associated with delusions or hallucinations and somatoform symptoms were 9 and 13 times more frequent in patients with anxiety disorders compared to those with other psychiatric conditions (P=.01; odds ratio [OR] 9.88, 95% CI 1.67-58.34 and P=.003; OR 13.13, 95% CI 2.34-73.65), respectively. In contrast, patients with schizophrenia were significantly less likely to be diagnosed with dermatoses resulting from delusions or hallucinations (P=.002; OR 0.04, 95% CI 0.00-0.75). A weak but significant negative association was also found between psychophysiological PDs and anxiety disorders (ϕ=-0.236; P=.02).

CONCLUSIONS

This study provides important insights into the overwhelming burden of psychodermatological conditions in patients with mental health disorders and specific associations with underlying psychiatric diagnosis.

Depression among people with chronic skin disease at Boru Meda Hospital in Northeast Ethiopia

BACKGROUND

The comorbidity of depression with chronic skin disease negatively affects the quality of life and disease prognosis, creating an immense burden on patients, families, and the wider community. However, there are limited studies conducted on the prevalence of depression and associated factors among people with chronic skin disease in Ethiopia.

OBJECTIVE

This study aimed to assess the prevalence and associated factors of depression among people with chronic skin disease at Boru Meda Hospital, Northeast Ethiopia.

METHODS

An institutional-based cross-sectional study was carried out from March 10- April 18, 2021, among a total of 381 people with chronic skin disease. The Patient Health Questioner-9 was used to assess depression. A logistic regression analysis model with an adjusted odds ratio was used to assess the strength of associations between the outcome and predictor variables. P-value < 0.05 was considered statistically significant.

RESULT

The magnitude of depression among people with chronic skin disease was 23.6% (95%Cl: 19.8%, 28.6%). We identified significantly increased odds of depression among participants with rural residence (AOR = 3.45, 95% CI: 1.64, 7.28), duration of illness above 5 years (AOR = 3.59, 95% CI: 1.31, 9.85), comorbid medical illness AOR = 2.51, 95% CI: 1.06, 5.98), family history of mental illness (AOR = 3.39, 95% CI: 1.11, 10.41), non-adherence to chronic skin disease medications (AOR = 3.53, 95% CI: 1.20, 10.41), low self-image (AOR = 4.69, 95% CI: 2.25, 9.77), and perceived stigma (AOR = 4.61, 95% CI: 2.14, 9.92).

CONCLUSION

Depression was common among patients with chronic skin diseases. This study has indicated a need for proper screening of depression in the current medical treatment of patients with chronic skin disease in Boru Meda Hospital, Northeast Ethiopia.