Table 6

Joinpoint analysis of crude incidence

SegmentLower end pointUpper end pointAnnual percentage changeLower 95th CIUpper 95th CITest
statistic (t)
Prob > |t|
 1199320000.3−2.32.90.20.8
 2200020046.9*0.513.72.30.0
 3200420130.7−0.21.61.70.1
  • *Reflects significance at the 0.05 level.