Symptom Checklist 90-Revised in neurological outpatients.

Area of Science:

• Neurology
• Psychiatry
• Psychometrics

Background:

• The Symptom Checklist 90-Revised (SCL-90-R) is a widely used self-report questionnaire for assessing psychological distress.
• Normative data for the SCL-90-R exist for healthy individuals and psychiatric patients, but not specifically for neurological populations.
• Understanding the symptom patterns in neurological patients is crucial for accurate assessment and interpretation.

Purpose of the Study:

• To analyze the self-reported symptoms of a large neurological outpatient population using the SCL-90-R.
• To establish normative data for neurological patients and compare symptom patterns across different neurological subgroups.
• To investigate the interpretation of SCL-90-R scores in the context of neurological conditions.

Main Methods:

• A cross-sectional analysis of 600 neurological outpatients completing the SCL-90-R.
• Comparison of SCL-90-R scores between neurological patients and healthy control subjects.
• Analysis of SCL-90-R answer patterns across five neurological subgroups: neurodegenerative disease, cerebrovascular disease, epilepsy, brain tumor, and traumatic brain injury.

Main Results:

• Neurological outpatients exhibited significantly higher scores on the SCL-90-R compared to healthy controls.
• The most pronounced elevated scores were observed in Inadequacy of Thinking and Acting, Depression, and Somatization.
• No significant differences in symptom patterns were found among the five neurological subgroups.
• Effect sizes for elevated scores were notable (1.69 for Inadequacy, 0.83 for Depression, 0.83 for Somatization).

Conclusions:

• Neurological patients report a higher burden of psychological complaints than the general healthy population.
• Elevated SCL-90-R scores in neurological patients do not automatically equate to psychopathology and require careful interpretation.
• A two-step comparison—first to healthy controls, then to neurological patient norms—is recommended for accurate assessment.