Table 4.

Odds ratios of AD for DBH -1021TT+TC vs CC in certain subsets

Subset	Adjusted* odds ratios of AD (95% CI, p)
	All	North Europe	North Spain
All	1.2 (1.06-1.4, 0.005)	1.2 (1.05-1.4, 0.01)	1.3 (0.97-1.7, 0.08)
Men	1.6 (1.2-2.0, 0.0002)	1.7 (1.3-2.2, 0.0002)	1.5 (0.9-2.55, 0.12)
All < 75 years	1.6 (1.2-2.2, 0.001)	1.55 (1.1-2.2, 0.02)	1.8 (1.04-3.0, 0.03)
Men < 75 years	2.2 (1.4-3.3, 0.0004)	2.2 (1.3-3.8, 0.002)	1.9 (0.8-4.4, 0.12)

AD = Alzheimer's disease, DBH = dopamine β-hydroxylase, CI = confidence interval.

* All analyses controlled for centre, age, sex and genotype of apolipoprotein E ε4.

Results in bold are significant at p < 0.05.