only marginally significantp = 0.08
Two other interactions for DRD risk were explored between: (i) sex and HCV diagnosis – only marginally significant ( χ 1 2 = 3.2 , p = 0.08); and (ii) injector status and time since most recent registration – also unremarkable even when only interactions for present injector were included ( χ 4 2 = 7.9 , p = 0.09).