Admission to hospital for pneumonia and influenza attributable to 2009 pandemic A/H1N1 Influenza in First Nations communities in three provinces of Canada

Table 2 Pneumonia and Influenza Hospitalizations (Crude Rate per 100,000 per week)

	2009	2004-08	H1N1 Attributable	Rate Ratio: 2009:2004-08
British Columbia
First Nations Reserves	13.77	9.48	4.29	1.45
Other Residents	6.65	6.18	0.47	1.08
Rate Ratio:	2.07	1.53	9.13	1.35*
First Nations:Other	2.07	1.53	9.13	1.35*
Manitoba
First Nations Reserves	26.84	18.44	8.40	1.46
Other Residents	11.21	10.07	1.14	1.11
Rate Ratio:	2.39	1.83	7.36	1.31*
First Nations:Other	2.39	1.83	7.36	1.31*
Ontario
First Nations Reserves	16.84	11.74	5.10	1.44
Other Residents	7.35	5.54	1.81	1.33
Rate Ratio:	2.29	2.12	2.81	1.08*
First Nations:Other	2.29	2.12	2.81	1.08*

Crude rates of hospitalization for pneumonia or influenza (any diagnostic field) per 100,000 population per week. 2009 represents the average combined rate of both waves of H1N1 and 2004-08 the average rate during the same weeks in each of the prior 5 years. *Indicates the “ratio of ratios” which represents the degree to which the rate of P&I admissions increased relative to the general population after taking into account expected differences in rates based on the rates of hospitalization for P&I in 2004-2009.

ISSN: 1471-2458