Table 1. Joinpoint analysis for elderly suicide mortality rates, China, 1987–2014.

Group	Period		Crude ESR			Standardized ESR
	Beginning	End	Beginning	End	APC (95%CI)	Beginning	End	APC (95%CI)
National	1987	1998	76.6	82.2	0.5 (−2.4, 3.4)	76.7	85.9	0.8 (−2.1, 3.9)
	1998	2014	82.2	30.2	−6.0 (−7.6, −4.4)*	85.9	30.8	−6.2 (−7.8, −4.7)*
	1987	2014	76.6	30.2	−3.7 (−4.6, −2.7)*	76.7	30.8	−3.7 (−4.7, −2.7)*
Rural males	1987	1998	92.5	122.1	0.8 (−2.2, 3.9)	96.1	127.8	0.7 (−2.3, 3.7)
	1998	2014	122.1	40.3	−6.4 (−8.0, −4.7)*	127.8	40.5	−6.6 (−8.2, −5.0)*
	1987	2014	92.5	40.3	−3.8 (−4.8, −2.8)*	96.1	40.5	−4.0 (−5.0, −3.0)*
Rural females	1987	1998	79.1	87.4	1.6 (−1.4, 4.6)	83.5	89.2	1.5 (−1.4, 4.5)
	1998	2014	87.4	29.8	−6.9 (−8.6, −5.2)*	89.2	30.2	−7.0 (−8.7, −5.4)*
	1987	2014	79.1	29.8	−3.7 (−4.9, −2.6)*	83.5	30.2	−3.9 (−5.0, −2.7)*
Urban males	1987	2014	29.4	22.3	−0.7 (−3.6, 2.3)	32.3	21.9	−1.4 (−4.3, 1.6)
Urban females	1987	2014	45.5	15.3	−1.9 (−4.4, 0.7)	47.2	15	−2.1 (−4.7, 0.5)

ESR: elderly suicide rate, APC: annual percent change, *The APC is significantly different from 0 at level of significance 0.05.