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Journal of Tuberculosis and Lung Disease ›› 2026, Vol. 7 ›› Issue (3): 363-370.doi: 10.19983/j.issn.2096-8493.20250208

• Original Article • Previous Articles     Next Articles

Epidemiological characteristics and trend of tuberculosis in Nanchuan District, Chongqing, 2004—2024

Zhang Ya1,2, Yu Ya1, Wang Qingya1, Sun Jian2, Li Yingya3()   

  1. 1 District and County Section, Chongqing Municipal Institute of Tuberculosis, Chongqing 400050, China
    2 Tuberculosis Control Section, Nanchuan Municipal Institute of Tuberculosis, Chongqing 408400, China
    3 Inpatient Department, Nanchuan Municipal Institute of Tuberculosis, Chongqing 408400, China
  • Received:2025-12-24 Online:2026-06-20 Published:2026-06-12
  • Contact: Li Yingya E-mail:410249398@qq.com

Abstract:

Objective: To analyze the trend of tuberculosis (TB) epidemic in Nanchuan District, Chongqing, and to provide evidence for developing targeted prevention and control strategies. Methods: Data on active TB cases reported in Nanchuan District from 2004 to 2024 was collected. The epidemiological distribution characteristics were retrospectively analyzed using descriptive methods, and the temporal trend in incidence was assessed by Joinpoint regression analysis. Results: From 2004 to 2024, a total of 10452 pulmonary tuberculosis cases were reported in Nanchuan District, with 47 deaths. The average annual notification incidence and mortality rates were 85.94/100000 (10452/12162419) and 0.39/100000 (47/12162419), respectively. The notification incidence peaked in spring (25.32/100000, 3079/12162419), was higher in males (113.58/100000, 7000/6163263), and was predominantly observed among individuals aged 35-39 years (8.64%, 903/10452), farmers (66.93%, 6996/10452), and residents of central townships/subdistricts (43.25%, 4520/10452). Joinpoint regression analysis indicated an overall declining trend in the average annual notification incidence over the past 21 years (AAPC=―5.62%, t=―12.05, P<0.001), with the most pronounced decline observed in winter (AAPC=―9.11%, t=―2.78, P=0.006). Regarding case composition, the proportion of patients in all age groups above 65 years (65-69, 70-74, 75-79, 80-84, and ≥85 years), as well as homemakers/unemployed patients, showed an increasing trend (AAPC values were 4.71%, 5.57%, 9.90%, 9.41%, 11.91%, 8.78%, t values were 6.78, 7.20, 10.38, 5.50, 4.78, 12.12, all P<0.001). The proportion of retirees also increased significantly from 2011 to 2024 (APC=11.81%, t=4.74, P<0.001). Conclusion: The overall tuberculosis epidemic in Nanchuan District showed a downward trend. However, prevention and control of tuberculosis should be continuously strengthened among males, farmers, and people aged 65 years and older, as well as during spring and the period around the Spring Festival.

Key words: Tuberculosis, pulmonary, Epidemiologic study characteristics as topic, Small-area analysis

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