Hammarstrom 2015.

Study characteristics
Patient Sampling	Retrospective study of patients for whom serum BDG was collected twice weekly
Patient characteristics and setting	Adult hematology or hematopoietic allogenic stem cell transplantation patients with 2 consecutive BDG tests. Thirteen patients had proven or probable IFI. The median age was 53 years (range 17 to 79 years), and 61% were male
Index tests	Glucatell test using 80 pg/mL as cut‐off for positivity
Target condition and reference standard(s)	Mixed IFI determined by the 2008 EORTC criteria with BDG excluded
Flow and timing	BDG test was done with 1 week of reference standard. All received index test and reference standard; however, possible IFI cases were excluded from the analysis
Comparative
Notes
Methodological quality
Item	Authors' judgement	Risk of bias	Applicability concerns
DOMAIN 1: Patient Selection
Was a consecutive or random sample of patients enrolled?	Yes
Was a case‐control design avoided?	Yes
Did the study avoid inappropriate exclusions?	Yes
Could the selection of patients have introduced bias?		Low risk
Are there concerns that the included patients and setting do not match the review question?			Low concern
DOMAIN 3: Reference Standard
Is the reference standards likely to correctly classify the target condition?	Yes
Were the reference standard results interpreted without knowledge of the results of the index tests?	Unclear
Could the reference standard, its conduct, or its interpretation have introduced bias?		Low risk
Are there concerns that the target condition as defined by the reference standard does not match the question?			Low concern
DOMAIN 4: Flow and Timing
Was there an appropriate interval between index test and reference standard?	Yes
Did all patients receive the same reference standard?	Yes
Were all patients included in the analysis?	No
Could the patient flow have introduced bias?		High risk