Original Article
Diagnostic Accuracy of Tests in Pediatric Gastroesophageal Reflux Disease

https://doi.org/10.1016/j.jpeds.2012.10.041Get rights and content

Objective

To systematically review the literature evaluating the diagnostic accuracy of commonly used diagnostic tests over conventional history taking and physical examination in children ≤18 months and >18 months suspected of gastroesophageal reflux disease (GERD).

Study design

We searched Medline, Embase, and the Cochrane database for studies assessing the diagnostic accuracy of pH-metry, pH-impedance, esophagogastroscopy, barium contrast study, scintigraphy, and empirical treatment as diagnostic tools. Quality was assessed according to Quality Assessment of Studies of Diagnostic Accuracy Included in Systematic Reviews criteria.

Results

Of the 2178 studies found, 6 studies were included, containing 408 participants (age 1 month-13.6 years) and 145 controls (age 1 month-16.9 years). Studies included children with GERD symptoms; 1 included an atypical presentation. In all the studies, the diagnostic accuracy of pH-metry was investigated, and in 2 studies esophagogastroscopy was investigated as well. Sensitivity and specificity were calculated in 3 studies. The range of reported sensitivity and specificity was broad and unreliable because of poor methodological quality according to Quality Assessment of Studies of Diagnostic Accuracy Included in Systematic Reviews criteria and inadequate study design.

Conclusion

Diagnostic accuracy of tests in children suspected of GERD remains unclear and implications for practice are hard to give. There is an urgent need of well-designed randomized controlled trials where the effect of treatment according to specific signs and symptoms will be compared with the effect of treatment based on the results of additional diagnostic tests, for patient relevant outcomes.

Section snippets

Methods

A clinical librarian searched Medline, Embase, and the Cochrane Database of systematic reviews (SR) electronic database for SRs, and clinical studies from inception to May 2012. The key words used to describe the study population were “esophagogastroscopy,” “pH-metry,” “pH-impedance,” “gastric emptying scintigraphy,” “barium radiography,” “GER,” “GERD,” “heartburn,” “extraesophageal symptoms,” “reflux esophagitis,” “infant,” “child,” and “adolescent” (medical subject headings and all fields).

Results

The search generated 2178 studies, of which 106 met our inclusion criteria (Figure; available at www.jpeds.com). No valid SR was encountered. After retrieving the full-text articles, 100 articles were excluded because of the lack of a control group, comparison between 2 diagnostic tests, and, therefore, no comparison with history and physical examination, use of antireflux medication during the study, and/or 1 of the other inclusion and/or exclusion criteria (Figure).

The 6 studies included were

Discussion

This systematic review clearly shows that, despite a large number of publications, there is a lack of high quality studies of the diagnostic accuracy compared with the current definition of GERD, which is based on history and physical examination. Therefore, the accuracy of tests in children ≤18 months and >18 months suspected of GERD remains unclear.

Nearly all studies investigating the accuracy of pH-metry used glass electrode catheters, 18, 19, 20, 21, 23 but ion sensitive field effect

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    The authors declare no conflicts of interest.

    Contributed equally.

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