Liebowitz Social Anxiety Scale (LSAS): Optimal cut points for remission and response in a German sample

Area of Science:

• Psychiatry
• Clinical Psychology
• Psychometrics

Background:

• The Liebowitz Social Anxiety Scale (LSAS) is a primary instrument for assessing social anxiety disorder (SAD).
• Establishing reliable cut-off scores is crucial for clinical interpretation of LSAS results, particularly for remission and treatment response.
• Previous cut-off scores have not been validated in German populations.

Purpose of the Study:

• To determine optimal cut-off (OC) scores for the LSAS-Self-Report (LSAS-SR) and LSAS-Clinician Administered (LSAS-CA) versions in a German sample.
• To validate these scores against established diagnostic criteria for SAD and treatment response.
• To provide evidence-based benchmarks for assessing SAD outcomes in clinical practice and research.

Main Methods:

• Utilized data from 311 patients with SAD who completed psychotherapeutic treatment in a multicenter randomized controlled trial.
• Employed receiver operating characteristic (ROC) analysis to identify OCs balancing sensitivity and specificity.
• Used diagnosis of SAD and symptom severity reduction (Structured Clinical Interview for DSM-IV) as gold standards.

Main Results:

• Optimal cut-off scores for remission were identified as 35 for LSAS-SR and 30 for LSAS-CA, demonstrating good sensitivity and specificity.
• Optimal cut-off scores for treatment response were a 28% reduction for LSAS-SR and 29% for LSAS-CA, also with acceptable sensitivity and specificity.
• These findings provide the first validated LSAS cut-points for a German sample.

Conclusions:

• The study successfully defined optimal cut-off scores for LSAS-SR and LSAS-CA in a German population for both remission and treatment response.
• These validated cut-points enhance the clinical utility of the LSAS for assessing social anxiety disorder outcomes.
• The results support and expand upon previously reported LSAS cut-points with a robust dataset.