Space-time clustering and associated risk factors of pulmonary tuberculosis in southwest China

Table 1 Investigated potential indicators of PTB in Zhaotong

Biological aspects	Behavioural aspects	Socio-economic aspects	Local environment aspects
Age^a	Alcohol intake^e	Annual family income (yuan)^k	Residence location^p
Gender^b	Chronic fatigue or overwork^f	Below poverty level^c	Family size^q
BCG vaccination^c1	Frequent Internet café visits^c	CDC (km from residence)^l	Number of persons per room^r
BMI^d	Marital status^g	CDC (minutes from residence)^m	Living space per person^s
Hormone therapy^c	Migrant work^c	Educational levelⁿ	Windows per m² of family space^t
Cancer^c	Smoking (active)^h	Health insurance^c1	Frequently keeping windows open ^c1
Chronic bronchitis^c	Smoking (passive)ⁱ	Occupation^o	Coal used for cooking/heating^c
Diabetes^c	Spitting habit^c		Electricity used for cooking/heating^c
HIV/AIDS^c			Firewood used for cooking/heating^c
Kidney disease^c			Natural/biogas used for cooking/heating^c
Mental disease^c			Other energy source for cooking/heating^c
Parasitic disease^c			PTB patient(s) living nearby^c
Pneumoconiosis^c			Contact with PTB patient(s)^c
Other^c

Abbreviations: AIDS Acquired immune deficiency syndrome, BMI Body mass index, CDC Zhaotong Center for Disease Control, HIV Human immunodeficiency virus
Definitions: ^a < 15 = 1/15–29 = 2/30–44 = 3/45–59 = 4/≥60 = 5; ^bmale = 1/female = 0; ^c1no = 1/yes = 0; ^cyes = 1/no = 0,^d < 18.5 = 1/≥25 = 2/18.5–24.9 = 3; ^enever = 1/in the past = 2/currently = 3; ^fyes(light or heavy = 1/no = 0; ^gunmarried = 1/married or remarried = 2/divorced or widowed = 3; ^hnever = 1/past smoker = 2/current smoker = 3; ⁱno exposure = 1/light exposure = 2/heavy exposure = 3; ^k < 2000 = 1/2000–5000 = 2/5001–10 000 = 3; ^l ≥ 10 001 = 4 < 15 = 1/15–30/31–60/≥61; ^m < 31 = 1/31–60 = 2/61–120 = 3/≥121; ⁿprimary school or below = 1/middle or technical secondary school = 2/junior college and above = 3; ^ofarmer or migrant worker = 1/other = 2/unemployed = 3/student = 4; ^purban = 1/rural = 0; ^q < 3 = 1/3–4 = 2/5–6 = 3/> 7 = 4; ^r ≤ 1 = 1/1.6–2 = 2/> 2 = 3; ^s ≤ 10 m² = 1/11–25 m² = 2/26–50 m² = 3/> 50 m² = 4; ^tlow(< 0.05) = 1/medium(0.05–0.077) = 2/high(> 0.077) = 3

ISSN: 2049-9957