Table 2.

The prevalence of dementia and its severity in 85-year-olds examined in 1986–87 and 2008–10.

	Dementia according to different methods
	Dementia			Dementia (examination only)			MMSE below 24 points
	1986–87% (N)	2008–10% (N)	OR (95%-CI)	1986–87% (N)	2008–10% (N)	OR (95%-CI)	1986–87% (N)	2008–10% (N)	OR (95%-CI)
Men	27.3 (39)	18.4 (39)	0.60 (0.36–0.997)	23.8 (34)	17.5 (37)	0.68 (0.40–1.14)	24.5 (35)	20.9 (43)	0.81 (0.49–1.35)
Women	30.8 (108)	23.7 (85)	0.70 (0.50–0.97)	24.5 (86)	19.5 (70)	0.75 (0.52–1.07)	31.0 (108)	22.6 (79)	0.65 (0.46–0.91)
All	29.8 (147)	21.7 (124)	0.66 (0.50–0.86)	24.3 (120)	18.7 (107)	0.72 (0.54–0.96)	29.1 (143)	22.0 (122)	0.69 (0.52–0.91)
	Severity of dementia
	Mild			Moderate			Severe
Men	7.7 (11)	2.4 (5)	0.29 (0.10–0.95)	9.1 (13)	8.5 (18)	0.93 (0.44–1.96)	10.5 (15)	7.5 (16)	0.70 (0.33–1.46)
Women	8.5 (30)	2.2 (8)	0.24 (0.11–0.54)	10.8 (38)	11.1 (40)	1.03 (0.65–1.65)	11.4 (40)	10.3 (37)	0.89 (0.56–1.43)
All	8.3 (41)	2.3 (13)	0.26 (0.14–0.49)	10.3 (51)	10.2 (58)	0.98 (0.66–1.46)	11.1 (55)	9.3 (53)	0.82 (0.55–1.22)

Note: Mini Mental State Examination (MMSE) was only done in 491 individuals in 1986–87.

The sample examined in 1986–87 is reference group for all odds ratio (OR).