Table 1

Questionnaires and assessments administered to multidrug resistant tuberculosis cases and controls in Mumbai, India

AssessmentCasesHousehold controlsNon-household controls
Serum 25-hydroxyvitamin D (liquid chromatography–mass spectrometry)
QuantiFERON-TB interferon-gamma release assays (QFT-TB IGRA)NA
Chest X-rayData abstraction (hospital records)
Sputum examinationData abstraction (hospital records)✓ (only if indicated by symptoms)✓ (only if indicated by symptoms)
HIV infectionData abstraction (hospital records)
Haemoglobin
Random blood sugar
Food frequency questionnaire
Clinical questionnaire
Background questionnaire
Anthropometric measurements