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Table 1 Definitions of terms used in this study

From: Prevalence and risk factors of active pulmonary tuberculosis among elderly people in China: a population based cross-sectional study

Term

Definition

Previous TB cases

Registered in TB Management Information System, and finished treatment or cured.

HIV/AIDS

Registered in local CDC database, whom were diagnosed according to diagnostic criteria for HIV/AIDS published by National Health Commission of the People’s Republic of China in 2008.

Known Diabetes

Recorded on the Citizen Health Management Files as diagnosed with Diabetes (fasting plasma glucose level ≥ 7.0 mmol/L, or 2-h plasma glucose level ≥ 11.1 mmol/L), plus those using medicine to control blood glucose by self-report.

Close Contacts

Living with new active PTB case for at least 7 days in the 3 months before diagnosis.

Underweight

BMI < 18.5, i.e. Weight (kg)/Height × 2 (m) < 18.5.

Tobacco use

Ever smoked tobacco by self-report.

Drinking history

Drinking more than one unit (21 g pure alcohol) per week by self-report.

Chronic bronchitis

Chronic bronchitis history by self-report.

Average family annual income per capita

Average annual income per capita of urban family = RMB 27000 (USD 3970), average annual income per capita of rural family = RMB 8000 (USD 1176), (USD 1 = RMB 6.8).

Average family living area per capita

Average of urban family = 29 m2, average of rural family = 31 m2