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Comparative Study
. 2014 Jan 11:14:21.
doi: 10.1186/1471-2334-14-21.

Changes in pulmonary tuberculosis prevalence: evidence from the 2010 population survey in a populous province of China

Xiaolin Wei, Xiulei Zhang  1 , Jia Yin, John Walley, Rachel Beanland, Guanyang Zou, Hongmei Zhang, Fang Li, Zhimin Liu, Benny C Y Zee, Sian M Griffiths
Affiliations
Comparative Study

Changes in pulmonary tuberculosis prevalence: evidence from the 2010 population survey in a populous province of China

Xiaolin Wei et al. BMC Infect Dis. .

Abstract

Background: This paper reports findings from the prevalence survey conducted in Shandong China in 2010, a province with a population of 94 million. This study aimed to estimate TB prevalence of the province in 2010 in comparison with the 2000 survey; and to compare yields of TB cases from different case finding approaches.

Methods: A population based, cross-sectional survey was conducted using multi-stage random cluster sampling. 54,279 adults participated in the survey with a response rate of 96%. Doctors interviewed and classified participants as suspected TB cases if they presented with persistent cough, abnormal chest X-ray (CXRAY), or both. Three sputum specimens of all suspected cases were collected and sent for smear microscopy and culture.

Results: Adjusted prevalence rate of bacteriologically confirmed cases was 34 per 100,000 for adults in Shandong in 2010. Compared to the 2000 survey, TB prevalence has declined by 80%. 53% of bacteriologically confirmed cases did not present persistent cough. The yield of bacteriologically confirmed cases was 47% by symptom screening and 95% by CXRAY. Over 50% of TB cases were among over 65's.

Conclusions: The prevalence rate of bacteriologically confirmed cases was significantly reduced compared with 2000. The survey raised challenges to identify TB cases without clear symptoms.

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Figures

Figure 1
Figure 1
Schematic diagram of data collection in the 2010 tuberculosis prevalence survey in Shandong, China.
Figure 2
Figure 2
Comparison of prevalence of bacteriologically confirmed cases between 2010 and 2000 by age and gender.
See this image and copyright information in PMC

References

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