Table 2. Cases and annualized incidence rate per 100,000 population of Invasive Haemophilus influenzae type a disease by age and ethnicity, 2000–2005*.

Demographic group	Total no. (range/y); rate (range/100,000/y)	Alaska, no. cases (rate)	Northern Canada, no. cases (rate)	p value*
Overall	42 (4–9); 0.9 (0.5–1.2)	11 (0.3)	31 (3.9)	<0.001
<2 y of age	30 (1–8) ;19.7 (4.0–31.4)	7 (5.7)	23 (79.1)	<0.001
Indigenous	35 (4–8); 2.9 (2.0–4.0)	8 (1.1)	27 (5.9)	<0.001
<2 y of age, indigenous	29 (1–8); 52.6 (11.2–86.2)	7 (20.9)	22 (101.9)	<0.001

*p value for rate, Alaska vs. northern Canada.