Table 6.

Prevalence rates per 100,000 persons at risk of dementia and subtypes in various population-based studies

All dementia
	Norway		Australia		Japan		England		England
	(Current study)		(Whithall et al., 2014)		(Ikejima et al., 2009)		(Harvey et. Al 2003)		(Ratnavalli et al., 2002)
Age:
50–54	92.9		102.7		59.0		62.5		–
55–59	163.2		131.2		94.3		152.1		–
60–64	328.6		265.2		163.3		166.3		–
30–64	85.5		68.2		51.7*		54.0		–
45–64	143.1		132.9		83.3		98.1		81.0
Dementia subtypes
	Norway	Australia	Japan	England	England	Norway	Australia	Japan	England	England
	(Current study)	(Whithall et al., 2014)	(Ikejima et al., 2009)	(Harvey et. Al 2003)	(Ratnavalli et al., 2002)	(Current study)	(Whithall et al., 2014)	(Ikejima et al., 2009)	(Harvey et. Al 2003)	(Ratnavalli et al., 2002)
	AD				VaD
Age:
50–54	20.7	6.4	9.8	16.4	–	3.4	6.4	22.9	6.6	–
55–59	55.6	13.1	28.0	50.7	–	11.1	13.1	42.2	32.6	–
60–64	207.3	74.6	49.5	77.3	–	15.6	49.7	78.4	38.7	–
30–64	37.0	9.3	13.4*	17.4	–	5.5	7.7	10.1*	8.7	–
45–64	65.4	19.9	22.3	35.0	15.1	8.0	14.9	38.6	17.9	8.2
	FTD				ARD
50–54	3.4	6.4	1.5	3.3	–	6.9	32.1	–	19.7	–
55–59	26.0	26.2	1.7	25.4	–	7.4	32.8	–	18.1	–
60–64	15.6	8.3	4.4	23.2	–	27.4	49.7	–	11.6	–
30–64	6.0	5.4	1.2*	7.5	–	5.5	16.3	–	6.6	–
45–64	10.6	11.6	2.0	15.4	15.1	9.7	33.1	–	13.6	–

^*Calculated.