Accuracy of ultrasound to identify chronic liver disease

Table 1 Inclusion and exclusion criteria for studies

Inclusion criteria	Exclusion criteria
Evaluated diagnostic accuracy	Did not evaluate diagnostic accuracy
Quantitative results of diagnostic performance presented in a format that enabled a 2 × 2 contingency table to be extracted OR results presented as sensitivity, specificity and prevalence	2 × 2 contingency table could not be extracted from results of diagnostic performance OR sensitivity, specificity and prevalence results not presented
Index test of study was an ultrasound imaging technique	Index test included was not an ultrasound imaging technique OR included a non-ultrasound imaging technique as part of the index test
Studies were conducted prospectively	Studies were not conducted prospectively
The reference test for all subjects in the study was liver biopsy	The reference test for the study was not liver biopsy OR liver biopsy was not used for all subjects
The sample population described were adults at risk of chronic liver disease	The sample population described included children OR sample population included adults not at risk of chronic liver disease
	The study was published as a case study, review or editorial