Table 3

Studies comparing different QT variability groups

1st marker2nd markerDifferenceNo differenceTotal
Non-consecutive QTConsecutive QT167
Non-consecutive QTNon-consecutive QTn193251
Non-consecutive QTConsecutive QTn22
Consecutive QTNon-consecutive QTn213
Consecutive QTConsecutive QTn22
Non-consecutive QTnConsecutive QTn0
• All possible combinations of comparison are shown in columns 1 and 2. The third column shows in how many studies there is a difference in association of the markers with the outcome. The fourth column shows how many studies show no difference.

• QTn, QT variability normalised.