Table 1.

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

	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

The bold indicated that the changes were significant

*The number of newly notified TB cases (per 100 000) at the first and the last year of the indicated segment