title: [Study on the risk factors of tuberculosis in four cities and provinces in China].
abstract: OBJECTIVE
  To investigate the influencing factors on tuberculosis (TB) in four provinces in the eastern and central parts of China.
  
  
  METHODS
  From Nov. 2009 to Feb. 2011, three population-based field surveys were conducted among the resident population in several townships/streets in Guangdong, Hunan and Jiangsu provinces and Shanghai municipality to collect TB-related information. 474 sputum smear positive TB patients and 1896 controls were randomly selected from the population under study and each case was matched by province, age and sex using a frequency matching method. Single-variable and multiple non-conditional logistic regression modeling were applied for data analysis, and odds ratios (ORs) and their corresponding 95% confidence intervals (CIs) were estimated.
  
  
  RESULTS
  Data from Single-variable analysis showed that TB history, history of exposure to TB, DM history, immigrant population and per-capita living space were risk factors for TB, and high level of education was protective factors.
  
  
  RESULTS
  from multiple logistic regression showed that the risk factors of TB would include the following items: history of having had TB (OR = 52.356, 95%CI: 18.956 - 144.607), living space over 50 m(2)per-capita (OR = 8.742, 95%CI: 1.107 - 69.064), history of exposure to TB (OR = 6.083, 95%CI: 2.336 - 15.839) and being immigrants (OR = 3.306, 95%CI: 1.907 - 5.734), while having had high degree of education as the protective factor of TB (OR = 0.284, 95%CI: 0.110 - 0.733).
  
  
  CONCLUSIONS
  Control programs targeting those ever having TB patients and contacts to TB patients as well as immigrants should be strengthened.
authors.affiliation: Department of Epidemiology and Biostatistics, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
authors.forename: Shi-yu
authors.initials: SY
authors.lastname: Zhu
authors.forename: Yong-chun
authors.initials: YC
authors.lastname: Hou
authors.forename: Wen
authors.initials: W
authors.lastname: Shu
authors.forename: Guo-liang
authors.initials: GL
authors.lastname: Zhang
authors.forename: Shao-fa
authors.initials: SF
authors.lastname: Nie
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.forename: Shi-ming
authors.initials: SM
authors.lastname: Cheng
authors.forename: Yi-hua
authors.initials: YH
authors.lastname: Xu
mesh_terms: D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D002681:China / Q000453:epidemiology; D002947:Cities; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D012307:Risk Factors; D014376:Tuberculosis / Q000453:epidemiology*