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Table 1 Joinpoint analysis of newly notified TB cases in different geographic regions of China

From: Changes in newly notified cases and control of tuberculosis in China: time-series analysis of surveillance data

  Newly notified TB cases* Annual percentage
change (95% CI)
P value
All provinces    
 1997 to 2002 34.69 to 43.58 3.5 (0.3–6.7)  < 0.001
 2002 to 2005 43.58 to 96.88 28.5 (15.3–43.1)  < 0.001
 2005 to 2018 96.88 to 59.27 −3.8 (−4.3 to −3.3)  < 0.001
Eastern provinces    
 1997 to 2002 33.23 to 33.13 −0.4 (−3.8–3.1) 0.800
 2002 to 2005 33.13 to 72.06 29.1 (13.4–46.8)  < 0.001
 2005 to 2018 72.06 to 42.81 −4.3 (−4.8 to −3.7)  < 0.001
Central provinces    
 1997 to 2002 31.03 to 41.04 3.7 (0.6–6.9)  < 0.001
 2002 to 2005 41.04 to 111.51 36.2 (23.0–50.8)  < 0.001
 2005 to 2018 111.51 to 59.78 −4.2 (−4.7 to −3.8)  < 0.001
Western provinces    
 1997 to 2002 40.90 to 55.69 6.0 (1.3–10.9)  < 0.001
 2002 to 2005 55.69 to 121.13 25.0 (6.8–46.2)  < 0.001
 2005 to 2018 121.13 to 84.13 −3.9 (−5.7 to −2.9)  < 0.001
  1. The bold indicated that the changes were significant
  2. *The number of newly notified TB cases (per 100 000) at the first and the last year of the indicated segment
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