Table 3.

Annual percentage change in incidence rate of all 10 RIDs, from 2004 to 2020.

Diseases	Trends	Annual percentage change (95% CI)	P-value†
All 10 RIDs	Stable	−2.2 (−4.6 to 0.3)	0.1
TB	Stable	−1.9 (−4.1 to 0.4)	0.1
Epidemic cerebrospinal meningitis	Decrease	−21.8 (−24.9 to −18.5)	< 0.05
Seasonal influenza	Increase	29.7 (16.6–44.4)	< 0.05
pH1N1*	Decrease	−59.4 (−78.1 to −24.8)	< 0.05
Measles	Decrease	−8.3 (−14.6 to −1.6)	< 0.05
Avian influenza H5N1‡	Decrease	−13.5 (−20 to 6.6)	< 0.05
Pertussis	Stable	−7.9 (−17.2 to 2.3)	0.1
Mumps	Decrease	−11.3 (−16.4 to −5.9)	< 0.05
Scarlet fever	Stable	1.4 (−1.9 to 4.8)	0.4
Rubella	Decrease	−0.5 (−0.8 to −0.1)	< 0.05

A normal (Z) distribution was used to assess the significance of the annual percentage change, and the parametric method was used to calculate 95% CIs.

^*Results of Cases and APC from pH1N1 were based on the full period from 2009 to 2013.

^†Joinpoint program provides significant values as P < 0.05.

^‡When incidence data contained zero, we substitute the zero with 1% of the smallest incidence.