Validating the Structure of the Depression and Somatic Symptoms Scale

Presurgical structural imaging and clinical outcome in combined bed nucleus of the stria terminalis-nucleus accumbens deep brain stimulation for treatment-resistant depression

Background

Structural imaging holds great potential for precise targeting and stimulation for deep brain stimulation (DBS). The anatomical information it provides may serve as potential biomarkers for predicting the efficacy of DBS in treatment-resistant depression (TRD).

Aims

The primary aim is to identify preoperative imaging biomarkers that correlate with the efficacy of DBS in patients with TRD.

Methods

Preoperative imaging parameters were estimated and correlated with the 6-month clinical outcome of patients with TRD receiving combined bed nucleus of the stria terminalis (BNST)-nucleus accumbens (NAc) DBS. White matter (WM) properties were extracted and compared between the response/non-response and remission/non-remission groups. Structural connectome was constructed and analysed using graph theory. Distances of the volume of activated tissue (VAT) to the main modulating tracts were also estimated to evaluate the correlations.

Results

Differences in fibre bundle properties of tracts, including superior thalamic radiation and reticulospinal tract, were observed between the remission and non-remission groups. Distance of the centre of the VAT to tracts connecting the ventral tegmental area and the anterior limb of internal capsule on the left side varied between the remission and non-remission groups (p=0.010, t=3.07). The normalised clustering coefficient (γ) and the small-world property (σ) in graph analysis correlated with the symptom improvement after the correction of age.

Conclusions

Presurgical structural alterations in WM tracts connecting the frontal area with subcortical regions, as well as the distance of the VAT to the modulating tracts, may influence the clinical outcome of BNST-NAc DBS. These findings provide potential imaging biomarkers for the DBS treatment for patients with TRD.

Examining the validity and reliability of the Arabic translated version of the depression and somatic symptoms scale (A-DSSS) among the Lebanese adults

The prevalence of depression is high worldwide, and somatic symptoms are known to be one of the most debilitating aspects of depression. However, clinicians often face challenges in accurately assessing this comorbidity. To address this issue, the Depression and Somatic Symptoms Scale (DSSS) was developed as a self-administered scale that can diagnose both depression and somatic symptoms. The objective of this study is to evaluate the validity and reliability of the Arabic-translated version of the DSSS (A-DSSS) in a sample of Lebanese adults, as well as to explore its associated factors. A cross-sectional study was conducted over a period of one month, from February to March 2023, and involved a sample of 422 participants who were aged 18 years or older. Participants completed a questionnaire that included various measures, including demographic characteristics, alcohol and smoking habits, physical activity history, as well as two scales: the Patient Health Questionnaire-9 (PHQ9) scale and the A-DSSS scale. The A-DSSS showed high internal consistency (Cronbach's alpha = 0.936), strong test-retest reliability (ICC of 0.988 with CI 0.976-0.994; p < 0.001), and a three-factor structure consistent with previous research. Convergent validity was supported by a significant correlation with the PHQ-9. Stepwise linear regression revealed that engaging in physical activity and increasing calorie consumption (as measured by MET-min/week score) were associated with a significant decrease in the A-DSSS total score and subscales. However, a significant increase in the A-DSSS total score was seen in the female gender in comparison for male gender. The A-DSSS revealed good psychometric properties and may be a useful tool for assessing depression and somatic symptoms in this population. The study also identified potential factors associated with depression and somatic symptoms, such as physical activity, calorie consumption, and gender, which may have implications in addressing depression and somatic symptoms for future interventions and clinical practice.

Comparing the associations of three psychometric scales at baseline with long-term prognosis of depression over a 10-year period

OBJECTIVE

The Depression and Somatic Symptoms Scale (DSSS), a free scale, includes depression (DS) and somatic (SS) subscales. This study aimed to compare the associations of the baseline DSSS, Hamilton Depression Rating Scale (HAMD) and Hospital Anxiety and Depression Scale (HADS) scores with the outcome of depression over a 10-year follow-up period.

METHODS

Two hundred ninety outpatients with major depressive disorder (MDD) were enrolled and were followed-up at the 6-month, 2-year, and 10-year points. The three scales were administered at each follow-up. Multiple linear regressions were used to compare the associations.

RESULTS

In a comparison of the HAMD, DS, and HADS-depression, the HAMD and DS scores at baseline were most strongly associated with the HAMD score at two (6-month and 2-year) and one (10-year) follow-up points, respectively. In a comparison of the HAMD, DS, SS, HADS-depression, and HADS-anxiety, the SS and HAMD scores at baseline were most strongly associated with the HAMD score at two (6-month and 10-year) and one (2-year) follow-up points, respectively.

CONCLUSIONS

The DS, SS, and HAMD scores at baseline were significantly associated with the long-term outcome of depression. Scales or subscales assessing somatic symptoms might be more strongly associated with the outcome of depression.

Deanxit and tandospirone relieved unexplained limb edema in a depressed pituitary adenoma survivor: A case report

Our case report describes a 45-year-old woman who suffered from limb edema for 2 months. We focused on tumor recurrence and other common potential diseases based on the pituitary adenoma history. However, none of the examinations showed any abnormality. Later, her continuous complaints about the family relationship and depressed mood came into sight, and a psychiatry consultation was arranged. Following that, she was diagnosed with major depressive disorder. After several days of Deanxit and tandospirone treatment, the patient's limb edema dramatically subsided. This is the first case of limb edema associated with depression. This highlights the importance of awareness of mental illness for non-psychiatrists, especially in patients with severe somatic symptoms, but with negative results.

Development of the psychosomatic symptom scale (PSSS) and assessment of its reliability and validity in general hospital patients in China

OBJECTIVES

To develop and verify the Psychosomatic Symptom Scale (PSSS) among psychosomatic patients and the cut-off value of PSSS in distinguishing psychosomatic patients from health controls.

METHODS

The PSSS was drafted by an expert workgroup. 996 patients and 366 controls from 14 general hospitals in China were recruited to complete PSSS, Patient Health Questionnaire-15 (PHQ-15) and Symptom Checklist-90 (SCL-90). Student's t-test, Kruskal-Wallis test, Cronbach's α, Spearman's correlation, and confirmatory factor analysis (CFA) were used to verify the PSSS. Receiver operating characteristic (ROC) analyses were used to determine the cut-off value.

RESULTS

Cronbach α of PSSS was 0.907. The PSSS was significantly correlated with SCL-90 somatization subscale (r = 0.682, P < 0.001) and PHQ-15 (r = 0.724, P < 0.001). CFA supported the theoretical two-factor structure of the PSSS, with comparative fit index (CFI) = 0.979, Tucker-Lewis index (TLI) = 0.977, root mean square error of approximation (RMSEA) = 0.039 (90% CI: 0.035-0.042), and standardized root mean residual (SRMR) = 0.054. As the sum score of PSSS was significantly higher in female, cut-off values were determined as 11 in females and 10 in males respectively.

CONCLUSIONS

The PSSS is a reliable and valid instrument for measuring psychosomatic symptoms.

Comorbidity with more anxiety disorders associated with a poorer prognosis persisting at the 10-year follow-up among patients with major depressive disorder

OBJECTIVE

No study has investigated the association between number of anxiety disorders (NADs) and long-term outcome over 10 years among patients with major depressive disorder (MDD). This study investigated this issue.

METHODS

At baseline, 290 outpatients with MDD were enrolled, 149 with at least one anxiety disorder (AD). Subjects were followed-up at six-month, two-year, and 10-year points. The Structured Clinical Interview for DSM-IV-TR was used to confirm psychiatric diagnoses. NADs at baseline was recorded. The Hamilton Depression Rating Scale (HAMD), the anxiety subscale of the Hospital Anxiety and Depression Scale (HADS-A), and the somatic subscale (SS) of the Depression and Somatic Symptoms Scale were employed. Generalized Estimating Equation models were used for statistical analysis.

RESULTS

MDD patients with ADs had greater depression, anxiety, and somatic severities at the three follow-up points than those without. NADs was significantly and positively correlated with the three dimensions and total duration of pharmacotherapy at follow-up. NADs was independently associated with symptom severity after controlling for depression and anxiety at baseline and pharmacotherapy. When the DSM-5 criteria for ADs were applied, the results were unchanged. Specific phobia, panic disorder and social phobia, and panic disorder and specific phobia were independently associated with depression, anxiety, and somatic symptoms, respectively.

LIMITATION

Pharmacotherapy at follow-up was not controlled. The three follow-up intervals were unequal.

CONCLUSIONS

Comorbidity with more ADs was associated with a poorer prognosis. The negative impacts of ADs on MDD persisted at the ten-year follow-up point. NADs was associated with the long-term prognosis of MDD.

Reliability and validity of the Depression and Somatic Symptoms Scale among patients with chronic low back pain

BACKGROUND

The Depression and Somatic Symptoms Scale (DSSS), which is a free scale that includes a depression subscale (DS) and a somatic subscale (SS), was developed to evaluate depression and somatic symptoms simultaneously. This study aimed to examine the reliability and validity of the DSSS among patients with chronic low back pain (CLBP).

METHODS

Two-hundred and twenty-five patients with CLBP were enrolled. Psychiatric diagnoses were made based on the Structured Clinical Interview for Diagnostic and Statistical Manual of Mental Disorders-IV-Text Revision. The DSSS, Oswestry Disability Index, Hospital Anxiety and Depression Scale (HADS), and Short Form 36 (SF-36) were administered. Cronbach's alpha was used to test internal consistency. Receiver operating characteristic (ROC) analysis was used to identify cutoff scores for a major depressive episode (MDE).

RESULTS

Subjects with an MDE (N=21) had greater severities of depression, anxiety, somatic symptoms, and disability as compared with those without an MDE. The Cronbach's alpha values of the DS and SS were 0.90 and 0.83, respectively. The DS and SS were significantly correlated with the Oswestry Disability Index, the HADS, and the SF-36 subscales. The DS had the greatest area under the receiver operating characteristic curve (0.96) as compared with the SS and the HADS subscales. The cutoff score for an MDE was a DS score ≥15 (sensitivity and specificity: 100% and 88.7%, respectively).

CONCLUSION

The DSSS subscales were of acceptable reliability and validity. The DS can be used as a tool for evaluating the severity of depression and detecting an MDE in patients with CLBP.