Covelli 2019.

Patient Sampling	Type of study: retrospective
Patient characteristics and setting	Sample size: 528 Female: 300 Mean age: 9.9 Inclusion criteria: age < 18, equivocal MRI, MRI report by non‐paediatric radiologist Exclusion criteria: non‐interpretable images (excessive motion), a known diagnosis of appendicitis in which surgery was not performed, studies read by paediatric radiologists Setting: USA
Index tests	Index test: MRI
Target condition and reference standard(s)	Target condition: appendicitis Reference standard: histology or operative findings
Flow and timing	Type and length of follow‐up: outpatient follow‐up > 1 month
Comparative
Notes	We identified this study by a search update during the editorial process of the review.