Table 2. Trends (joinpoint analysis) and average annual percentage change for thyroid cancer in Oman by gender, 1996–2015.

Gender	Trend 1		Trend 2
	Year	APC (95% CI; p-value)	Year	APC (95% CI; p-value)	AAPC (95% CI; p-value)
Males	1996–2015	2.1 (-0.5 to 4.8; p = 0.100)			2.1 (-0.5 to 4.8; p = 0100)
Females	1996–2008	-1.9 (-5.4 to 1.8; p = 0.300)	2008-2015	14.3* (8.0 to 20.9; p < 0.010)	3.8* (0.8 to 6.8; p < 0.010)
Both	1996–2010	-0.6 (-3.9 to 2.9; p = 0.700)	2010-2015	16.7* (4.9 to 29.9; p < 0.010)	3.7* (0.2 to 7.4; p < 0.010)

APC: annual percentage change; AAPC: average annual percentage change; CI: confidence interval.

*Indicated that the APC or AAPC are significantly different from zero at the alpha = 0.05 level.