Kurbaniyazova 2017

Study characteristics
Patient sampling	Cross‐sectional design, consecutive enrolment, retrospective data collection
Patient characteristics and setting	Presenting signs and symptoms: people with cough of 2 weeks, fever, night sweats and weight loss; TB patients with positive smear results or a sputum smear‐negative result but radiographic abnormalities suggestive of TB; retreatment cases; contacts of TB or MDR‐TB patients; patients with severe clinical condition; and HIV‐positive patients or those with unknown HIV status in high‐risk settings such as migrants or prisoners; according to the diagnostic algorithm of Kyrgyzstan’s National Tuberculosis Programme’s clinical protocol Age: adults > 18 Sex, female: not reported HIV infection: not reported History of TB: not reported Sample size: 2734 Clinical setting: outpatient Laboratory level: central Country: Kyrgyzstan World Bank Income Classification: middle income High TB burden country: no High MDR‐TB burden country: yes High TB/HIV burden country: no Prevalence of TB cases in the study: 62.2%
Index tests	Index: Xpert MTB/RIF
Target condition and reference standard(s)	Target condition: pulmonary TB Reference standard for pulmonary TB: LJ and MGIT Target condition: Rifampicin resistance Reference standard for rifampicin resistance: LJ and MGIT
Flow and timing
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
		Low	Low
DOMAIN 2: Index Test Xpert MTB/RIF
Were the index test results interpreted without knowledge of the results of the reference standard?	Yes
If a threshold was used, was it pre‐specified?	Yes
		Low	Low
DOMAIN 3: Reference Standard
Is the reference standards likely to correctly classify the target condition?	Yes
Were the reference standard results for TB detection interpreted without knowledge of the results of the index test?	Yes
Were the reference standard results for rifampicin resistance detection interpreted without knowledge of the results of the index test?	Yes
		Low	Low
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?	Yes
		Low