Lorent 2015
| Study characteristics | |||
| Patient sampling | Cross‐sectional design, consecutive enrolment, prospective data collection | ||
| Patient characteristics and setting | Presenting signs and symptoms: presumptive drug‐resistant TB, including previously treated people (failure, relapse, return after default); symptomatic close contacts of known MDR‐TB cases; new TB patients with delayed smear conversion at month 2 or 3 of first‐line treatment; and all HIV‐infected people, regardless of smear results Age: median: 43 years (IQR 34 to 52) Sex, female: 47% HIV infection: 65% History of TB: 46% Sample size: 274 Clinical setting: outpatient Laboratory level: central Country: Cambodia World Bank Income Classification: middle income High TB burden country: yes High MDR‐TB burden country: no High TB/HIV burden country: no |
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| Index tests | Index: Xpert MTB/RIF | ||
| Target condition and reference standard(s) | Target condition: rifampicin resistance Reference standard for rifampicin resistance: LJ proportion method |
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| 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? | No | ||
| Were the reference standard results for rifampicin resistance detection interpreted without knowledge of the results of the index test? | No | ||
| High | 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 | |||