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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