[The diagnostic validity of non-invasive pancreatic function tests--a meta-analysis]

Area of Science:

• Gastroenterology
• Diagnostic Medicine
• Pancreatic Function Testing

Background:

• Exocrine pancreatic insufficiency (EI) diagnosis relies on pancreatic function tests.
• Non-invasive (tubeless) tests are increasingly utilized for EI diagnosis.
• Evaluating the diagnostic accuracy of these non-invasive tests is crucial.

Purpose of the Study:

• To perform a meta-analysis of studies evaluating the diagnostic validity of non-invasive pancreatic function tests.
• To assess the sensitivity and specificity of various non-invasive tests for diagnosing EI.
• To compare the diagnostic performance of different non-invasive tests against established criteria.

Main Methods:

• Meta-analysis of studies on non-invasive pancreatic function tests.
• Inclusion criteria required sensitivity calculation against invasive gold-standard tests.
• Tests had to differentiate between slight, moderate, and severe EI for inclusion.

Main Results:

• Fecal chymotrypsin: Sensitivity 54% (slight EI), 53% (moderate EI), 89% (severe EI); Specificity 74%.
• NBT-PABA test: Sensitivity 49% (slight EI), 64% (moderate EI), 72% (severe EI); Specificity 83%.
• Pancreolauryl test: Sensitivity 63% (slight EI), 76% (moderate EI), 94% (severe EI); Specificity 85%.
• Fecal elastase-1: Sensitivity 54% (slight EI), 75% (moderate EI), 95% (severe EI); Specificity 79%.

Conclusions:

• No single non-invasive pancreatic function test demonstrated sufficient sensitivity for diagnosing slight to moderate EI.
• The diagnostic performance of non-invasive tests varies, with some showing higher accuracy for severe EI.
• Further development and validation of non-invasive tests are necessary for reliable EI diagnosis.