Table 6.

Joinpoint analysis of crude incidence

Segment	Lower end point	Upper end point	Annual percentage change	Lower 95th CI	Upper 95th CI	Test statistic (t)	Prob > |t|
1	1993	2000	0.3	−2.3	2.9	0.2	0.8
2	2000	2004	6.9*	0.5	13.7	2.3	0.0
3	2004	2013	0.7	−0.2	1.6	1.7	0.1

*Reflects significance at the 0.05 level.