Relationship between Insulin Levels and Nonpsychotic Dementia: A Systematic Review and Meta-Analysis
Table 1
Quality assessment of the included studies according to the Newcastle-Ottawa Scale (NOS).
Study names
S1
S2
S3
S4
C1a
C1b
E1a
E1b
E2
E3
Total points
Si-ling Liu, 2011
1
1
1
1
0
1
1
0
0
0
6
Qin-yun Li, 2015
1
1
1
1
0
1
1
0
1
0
7
Zong-yuan Wang, 2008
1
1
1
1
0
1
1
0
1
0
7
Abimbola A. Akintola, 2015
0
1
1
0
0
1
1
0
1
0
5
Angela J. Hanson, 2016
1
1
0
0
1
0
1
0
1
0
5
J.K. Morris, 2016
1
1
0
0
0
1
1
0
1
0
5
G. Stennis Watson, 2009
1
1
1
1
0
1
1
0
1
0
7
Robert Krikorian, 2012
1
1
0
0
0
1
1
0
1
0
5
E. Rönnemaa, B. Zethelius, and J. Sundelöf, 2009
1
1
0
1
1
0
0
1
1
0
6
Galit Weinstein, 2015
0
1
1
1
0
1
1
0
1
0
6
Jeffrey M. Burns, 2012
0
1
1
1
0
1
1
0
1
0
6
Auriel A. Willette, 2015
0
1
1
1
0
1
1
0
1
0
6
Amber S. Watts, 2013
1
1
1
1
1
1
1
0
1
1
9
Josh D. Woolley, 2014
1
1
0
0
1
0
1
0
1
1
6
Xiao-hong Sun, 2010
1
1
0
1
1
0
1
0
1
0
6
Lu Zhang, 2011
1
1
0
1
1
0
1
0
1
0
6
Wei-gang Liu, 2009
1
1
0
0
1
0
1
0
1
0
5
Gui-qing Chen, 2015
1
1
0
1
1
0
1
0
1
1
7
Zhi-juan Wang, 2014a
1
1
0
1
1
0
1
0
1
0
6
Jun-shi Zhang, 2016
1
0
0
1
1
1
1
0
1
1
7
Jin-geng Li, 2013
1
1
0
1
1
1
1
0
1
1
8
Zhi-dong Yang, 2007
1
0
1
1
0
1
1
0
1
0
6
Hong-mei Yue, 2014
1
1
0
1
1
1
1
0
1
0
7
Liang-mi Li, 2015
1
1
1
1
1
1
1
0
1
0
8
Qing-chun Xia, 2015
1
1
0
1
1
1
1
1
1
0
8
Ran Song, 2015
1
1
0
1
1
1
1
0
1
1
8
Yu-mei Yang, 2009
1
0
0
1
1
1
1
0
1
0
6
Xiao-lan Liu, 2008
1
1
0
1
1
1
1
0
1
1
8
Rong-wei Zhang, 2008
1
1
0
0
1
0
1
0
1
0
5
Bin-bin Zang, 2011
1
1
0
1
1
1
1
0
1
0
7
Zhi-juan Wang, 2014b
1
1
1
1
1
0
1
0
1
0
7
Hong-shan Pan, 2016
1
1
0
1
1
0
1
0
1
0
6
Nan Mu, 2010
1
1
1
1
1
0
1
0
1
0
7
Yan-Wu, 2008
1
1
0
1
1
0
1
0
1
0
6
Hong-li Li, 2013
1
1
0
1
1
0
1
0
1
0
6
Jill K. Morris, 2014
1
0
0
0
1
1
1
0
1
1
6
Wen-qing Xia, 2016
1
1
1
1
1
0
1
0
1
0
7
Chin-Chou Huang, 2014
1
1
1
1
0
1
1
0
1
0
7
Rosebud O. Roberts, 2014
1
1
1
0
0
1
1
0
1
0
6
Mkaya Mwamburi, 2016
1
1
0
1
0
0
1
1
1
0
6
Heather Kenna, 2013
1
1
1
1
1
0
1
0
1
0
7
Yen-Chun Fan, 2017
1
1
1
1
0
1
1
0
1
0
7
Laura D. Baker, 2011
0
1
1
1
0
1
1
0
1
0
6
M.S. Beeri, 2008
0
1
1
1
0
1
1
0
1
0
6
Hannah Bruehl, 2009
1
1
1
1
1
1
1
1
1
0
9
Xiao-bing Zhou, 2012
0
1
0
1
1
0
1
0
1
0
5
Qiong-yu Zhang, 2012
1
1
0
0
1
1
1
0
1
0
6
Xiao-hong, Zhao, 2009
1
1
0
1
1
1
1
0
1
0
7
Jun-yi Wu, 2013
1
1
0
1
1
1
1
0
1
0
7
Sheng Huang, 2015
1
1
0
1
1
1
1
0
1
0
7
Note. S1: eligibility criteria; S2: representativeness of the cases; S3: community controls; S4: the controls had no history of disease (endpoint); C1a: important factor basis between two groups; C1b: study controls for additional factor basis between two groups; E1a: secure record of exposure; E1b: structured interview where blind to case about the exposure; E2: same method of ascertainment for cases and controls; E3: nonresponse rate. Cross-sectional study.
