Study Quality: | Zhang et al. 2006 [17] | Zhou et al. 2012 [13] | Zhang et al. 2006 [27] | Xing et al. 2006 [28] | Xie et al. 2005 [29] | Chu et al. 2005 [30] | Huang et al. 2008 [31] | Huang et al. 2008 [32] | Liu et al. 2012 [33] | Chu et al. 2004 [34] | Ye et al. 2003 [35] | Ye et al. 2005 [36] | Wang et al. 2007 [12] | Luo et al. 2009 [15] | Hou et al. 2011 [40] | Luo et al. 2010 [37] | Zhao et al. 2004 [38] | Luo et al. 2012 [39] |
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Research question specified and clear? | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
Outcome measures relevant for AD research | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
Are the characteristics of study population clear? | ||||||||||||||||||
Species | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
Background/generation | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
Sex (and distribution) | √ | √ | √ | √ | √ | N | √ | N | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
Age | √ | N | √ | √ | √ | √ | N | √ | N | √ | √ | √ | √ | N | √ | N | N | √ |
Presence and correct control group? | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
Where the groups similar at baseline (if not randomized think of weight and sex etc.)? | √ | √ | √ | √ | N | √ | √ | √ | √ | √ | N | √ | ? | √ | √ | √ | √ | √ |
Is the experiment randomized? | √ | √ | √ | √ | N | √ | √ | √ | √ | √ | N | √ | √ | √ | √ | √ | √ | √ |
Kind of supplement mentioned (TSG)? | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
Age when supplementation started mentioned? | √ | N | √ | √ | √ | √ | N | √ | N | √ | √ | √ | √ | N | √ | N | N | √ |
Duration of supplementation clear and specified? | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
Amount of TSG mentioned | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
Administration route specified | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
Is the timing of the supplementation during the day specified and similar in both groups? | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
Methods used for outcome assessment the same in both groups ? | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
Drop outs described for each group separately? | N | N | N | N | N | N | N | N | N | √ | N | N | N | N | N | N | N | N |
Blinded outcome assessment? | √ | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N |
Was the outcome assessment randomized across the groups? | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N |
Total number of animals included in statistical analyses clear? | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
Age of sacrificing animals mentioned? | √ | N | √ | √ | √ | √ | N | √ | N | √ | N | √ | √ | N | √ | N | N | √ |
Quality score (items√) | 19 | 15 | 18 | 18 | 16 | 17 | 16 | 17 | 16 | 19 | 15 | 18 | 18 | 15 | 15 | 15 | 15 | 18 |