Genetic Association of CHAT rs3810950 and rs2177369 Polymorphisms with the Risk of Alzheimer’s Disease: A Meta-Analysis

Table 2

Quality assessment scheme for the included literatures (Newcastle-Ottawa Scale).

First author	Year	Selection				Comparability	Exposure			Total
		I	II	III	IV	V	VI	VII	VIII
Mubumbila [13]	2002
Harold [20]	2003
Kim [12]	2004
Cook [21]	2005
Ahn Jo [14]	2006
Ozturk [15]	2006
Tang [16]	2008
Grünblatt [17]	2009
Grünblatt [18]	2011
Mengel-From [10]	2011
Lee [19]	2012
Piccardi [22]	2007
Scacchi [23]	2009

Note: I: is the case definition adequate? II: representativeness of the cases. III: selection of controls. IV: definition of controls. V: comparability of cases and controls on the basis of the design or analysis. VI: ascertainment of exposure. VII: same method of ascertainment for cases and controls. VIII: nonresponse rate.