Table 4.

Mean seasonal mortality for respiratory disease^a attributable to influenza according to age and risk status^b

		Influenza A		Influenza B
Age	Risk	N (SD)	Rate (SD)	N (SD)	Rate (SD)
0–4	All	12	0	1	0
	Low	13	0	2	0
	High	3	0	0	0
5–17	All	4	0	2	0
	Low	2	0	0	0
	High	16	0	19	0
18–49	All	84	0	13	0
	Low	61	0	9	0
	High	278	1	45	0
50–64	All	402	4	27	0
	Low	145	1	16	0
	High	1316	13	71	1
65–74	All	955	19	27	1
	Low	367	7	0	0
	High	1875	38	79	2
75+	All	4776	118	512	13
	Low	5042	125	671	17
	High	4627	114	375	9
All agesc	All	6561 (5501)	11 (9)	602 (681)	1 (1)
	Low	3672 (3107)	6 (5)	436 (501)	1 (1)
	High	19762 (17261)	34 (29)	1395 (1569)	2 (3)

N Number of episodes, SD standard deviation, Rate per 100,000 population, Deaths from ONS 1996–2009

^abroadly defined

^bRisk group defined according the chronic conditions indicative of risk for severe influenza as per UK recommendations for influenza vaccination. These include chronic obstructive respiratory disease; cardiovascular, central nervous system, renal and liver disorders; diabetes; immunosuppressive conditions or stroke

^cthe attributions for each age group are not equal to the sum of the attributions (all ages) due to separately run models