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. 2018 Mar 6;8(3):e017883. doi: 10.1136/bmjopen-2017-017883

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Consistency test in the network meta-analysis. The X-axis is log OR, and the vertical line is 0. IF is the absolute inconsistency factor, meaning the logarithm of the ratio of ORs of direct and indirect evidences for each comparison loop. The absolute IF values and CIs are truncated at zero indicate no significant difference of inconsistency. IF, inconsistency factor; Se, sodium selenite; Se salt, selenium salt; Se+VC, the combination of sodium selenite with vitamin C; Se yeast, selenium enriched yeast; VC, vitamin C.