Glasgow Benefit Inventory
Also known as: GBI
The Glasgow Benefit Inventory (GBI) is an 18-item self-report questionnaire designed to measure change in health status and general well-being resulting from otolaryngologic intervention (surgery, medical treatment). Unlike generic health-related quality-of-life measures, the GBI is disease-specific, asking patients to compare their post-intervention status to their pre-intervention baseline. Developed by Robinson, Gatehouse, and Browning in 1996, the GBI has become the standard outcome measure for evaluating benefit from ear, nose, and throat surgery and treatment.
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When to use it
The GBI is indicated for outcome assessment following otolaryngologic interventions including hearing aid fitting, cochlear implant, mastoid surgery, tympanostomy tubes, functional endoscopic sinus surgery (FESS), septoplasty, rhinoplasty, laryngeal surgery (vocal cord injection, thyroplasty, laryngeal framework surgery), and head-neck cancer rehabilitation. Valuable for patient counseling pre-operatively (setting realistic expectations), post-operative monitoring, quality improvement in surgical programs, and health economic analysis (cost-benefit of interventions).
Strengths & limitations
- Disease-specific, change-focused design ensures measured benefit reflects true intervention effect on patient well-being
- Multidimensional assessment across general health, social support, and physical function relevant to patient expectations
- Excellent reliability (test-retest intraclass correlation coefficient = 0.88) and validity across diverse otolaryngologic populations
- Simple, intuitive response format; minimal respondent burden
- Extensively used in otolaryngologic trials and practice, enabling comparison across studies and programs
- Prospective design (pre-to-post comparison) avoids recall bias and ensures baseline-outcome linkage
- Omnibus scale does not distinguish between peripheral hearing benefit and central cognitive/emotional benefit
- Retrospective comparison depends on patient memory of pre-intervention status; may be affected by passage of time, new intervening illnesses, or mood shifts
- Insensitive to very specific treatment goals; asks about general well-being rather than targeted outcome (e.g., specific speech improvement after laryngeal injection)
- Not validated in non-English-speaking populations initially, though translations now available
Frequently asked
When should GBI be administered post-operatively?
GBI is typically administered 3–6 months after intervention to allow adequate time for recovery and adaptation. Shorter intervals (2–3 weeks) may capture early surgical trauma effects (negative scores). Longer intervals (>12 months) may introduce confounding life events. Protocol should specify timing based on the procedure and expected recovery trajectory.
What does a negative GBI score mean?
A negative GBI score indicates perceived worsening of general well-being compared to pre-intervention status. This may reflect post-operative pain, temporary hearing fluctuation, side effects, or unrealistic expectations. Negative GBI does not always indicate treatment failure; some patients improve with time. Assess objective outcomes (audiometry, imaging, endoscopy) and explore specific complaints to distinguish true harm from temporary recovery effects.
How does GBI differ from condition-specific outcome measures like audiometry or endoscopy?
GBI measures patient-perceived overall benefit and well-being; audiometry measures hearing thresholds; endoscopy visualizes anatomy. All are complementary. A patient may have excellent objective outcomes (improved audiometry) but low GBI if expectations were not met or lifestyle remains unchanged. Conversely, modest objective improvement with high GBI indicates patient satisfaction. Report all three for complete outcome assessment.
Can GBI be used to compare different interventions?
Yes. GBI allows comparison of patient-perceived benefit across different procedures or treatment strategies in similar populations. For example, GBI scores comparing hearing aid users to cochlear implant recipients can inform patient choice. However, population differences (age, severity, co-morbidity) influence GBI; like-with-like comparison (stratified by severity) is essential for valid interpretation.
Sources
- Robinson, K., Gatehouse, S., & Browning, G. G. (1996). Measuring patient benefit from otorhinolaryngological surgery and treatment. Annals of Otology, Rhinology & Laryngology, 105(6), 415-422. DOI: 10.1177/000348949610500601 ↗
How to cite this page
ScholarGate. (2026, June 3). Glasgow Benefit Inventory. ScholarGate. https://scholargate.app/en/otolaryngology/glasgow-benefit-inventory
Which method?
Set this method beside its closest kin and read them side by side — the library lays the books on the table; the choice is yours.
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