It specifically states that for local studies, looking at the raw data would be better. (realclimate.org)
Local studies suggest that when cats are fed at off - peak hours and away from foot traffic, complaints may be reduced. (catwelfare.org)
The main novelty of the current study is that it combined the evidence across many local studies, thus for the first time providing an overarching picture of the magnitude of the impact across a large number of species. (sciencedaily.com)