Table 3.

Papillary thyroid cancer incidence rates^a (per 100,000) by age group and calendar period in Hispanic women, California 1988–2004.

	1988–1994			1995–1999			2000–2004			APCb (95% CI)
	Cases	Aggregate Population	Rate (95% CI)	Cases	Aggregate Population	Rate (95% CI)	Cases	Aggregate Population	Rate (95% CI)
Age <55
US-born	568	14,196,718	6.50 (5.93–7.12)	537	12,719,188	7.52 (6.85–8.24)	869	15,403,810	10.65 (9.90–11.44)	4.5 (3.3–5.7)
Foreign-born	496	10,377,516	4.48 (4.06–4.93)	626	9,176,475	5.93 (5.45–6.45)	852	10,198,961	6.67 (6.,22–7.17)	3.5 (2.2–4.7)
IRRc			1.45 (1.27–1.66)			1.27 (1.12–1.44)			1.60 (1.44–1.77)
Age ≥ 55
US-born	84	1,238,621	6.33 (4.96–7.99)	95	997,333	9.13 (7.35–11.22)	153	1,200,313	12.40 (10.51–14.53)	6.0 (3.4–8.6)
Foreign-born	147	1,390,452	10.51 (8.86–12.39)	152	1,315,495	11.68 (9.86–13.76)	305	1,800,970	16.68 (14.80–18.73)	4.5 (2.8–6.2)
IRRc			0.60 (0.45–0.81)			0.78 (0.59–1.02)			0.74 (0.61–0.91)

^aAge-standardized to the 2000 United States population.

^bAnnual percent change(APC); joinpoint regression found a single regression line fit the data (1988–2004); p<0.05.

^cIncidence rate ratio (IRR) comparing US-born to foreign-born (reference) Hispanic women.