Table 1.

 Incidence of dementia by age and sex, 1997-2007

Age band (years)	Women				Men			Incidence rate ratio (95% CI)
	No	Person years at risk	Incidence* (95% CI)		No	Person years at risk	Incidence* (95% CI)
60-69	600	1 122 402	0.53 (0.49 to 0.59)		527	1 086 063	0.49 (0.44 to 0.53)	1.10 (0.98 to 1.24)
70-79	3515	936 166	3.75 (3.63 to 3.88)		2179	774 927	2.81 (2.69 to 2.93)	1.34 (1.27 to 1.41)
80-89	7193	608 358	11.82 (11.55 to 12.10)		3120	366 622	8.51 (8.21 to 8.81)	1.39 (1.33 to 1.45)
≥90	2603	231 523	11.24 (10.81 to 11.67)		672	89 804	7.48 (6.92 to 8.05)	1.50 (1.38 to 1.64)

*Incidence of dementia per 1000 person years at risk.