Influence of variable groups on multifactorial-based by clustering dendrogram comparisons.

<p>This panel of four plots compare dendrograms with the same set of labels, one facing the other, and having their labels connected by lines. In every comparison, all-variables clustering dendrogram was compared with a modified version of this dendrogram obtained after subtracting one of these group of variables at a time (a, ‘quality’: AMSTAR levels; b, ‘conflict’: source of funding, number of authors with conflict of interest; c, ‘social’: Twitter, Facebook, and Google+ mention counts; d, ‘usage’: Mendeley and SCOPUS readers and citation counts from Google Scholar). Unique nodes are highlighted with dashed lines. Connecting lines are colored to highlight two sub-trees which are present in both dendrograms. Black lines connect nodes not included in the same sub-tree. Same color of trees branches show two common sub-trees.