Authors Year Country Reference Number of subject Age range
Wettstein et al. 1991 Switzerland [124] 805 people 81-85 years
99 dementia
Forster et al. 
Taylor et al.
1995 UK [40]
[125]
109 early-onset AD <65 years
109 controls
Sohn et al. 1996 Korea [126] 558 people ≥60 years
45 dementia
Martyn et al. 1997 UK [127] 106 AD 42-75 years 
441 controls
Molloy et al. 2007 Randomized case-control trial [128] 16 AD N/A
17 controls
10 young volunteers
Bakar et al. 2010 Turkey [34] 273  people living in high Al area N/A
164 people in other area
Table 4: Epidemiological and clinical trial reports showing an absence of a significant risk of Al-containing water for cognitive impairment, dementia, and AD.
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