highly significantp <0.05
The benefit from CRT was highly significant in women beginning at a QRS duration ≥130 milliseconds (QRS duration 130 to 139 ms HR 0.19, p <0.05), but there was no benefit in men with QRS durations ≤140 ms (HR 1.12, p >0.05) and a non-significant benefit in the group with QRS durations from 140 to 159 ms (HR 0.76, p >0.05).