The Interpretability of the Neurogenic Bladder Symptom Score

Area of Science:

• Urology
• Neuroscience
• Clinical Assessment

Background:

• Neurogenic bladder significantly impacts quality of life.
• Standardized tools are needed to quantify symptom severity.
• The Neurogenic Bladder Symptom Score (NBSS) and NBSS-short form (SF) require defined interpretability ranges.

Purpose of the Study:

• To establish mild, moderate, and severe symptom categories for the NBSS and NBSS-SF.
• To calculate the minimal clinically important difference (MCID) for the NBSS-SF.
• To enhance the clinical utility of the NBSS and NBSS-SF in assessing neurogenic bladder.

Main Methods:

• Utilized existing datasets from validation and cross-sectional studies involving patients with spinal cord injury, multiple sclerosis, and spina bifida.
• Mapped validated severity categories from ICIQ-UI, IPSS, and SCI-QOL Bladder complications to NBSS domains.
• Determined anchor-based MCID for the NBSS-SF total score.

Main Results:

• Established NBSS total score categories: 0-32 (mild), 33-48 (moderate), 49-74 (severe).
• These categories showed significant differences across four study populations.
• Group-level MCID for NBSS-SF was determined to be an improvement of 1.8.

Conclusions:

• Defined interpretability ranges for NBSS and NBSS-SF scores.
• These ranges facilitate better interpretation of patient-reported outcomes and clinical trial results for neurogenic bladder.
• The findings support improved clinical decision-making and patient management.