Table 3.

DDH Evidence Quality Inventory

Cohort definitionBoth match our nodesOne matches, the other is closeNeither match, but both closeMix or unclear
PathShort path1 node intermediate>1 node intermediateUnclear path
Assignment and comparisonRandomComparative armSingle armHaphazard
Follow upPositives and negativesAll positivesSome positives
Outcome definitionMatches ours3 (all) categories2 categoriesNo explicit definition
AscertainmentNo contaminationContamination <10%Contamination ≤20%Contamination >20%
ResultsFill entire tableFill partial tableFill entire row or columnFill partial row or column