Meanings of nonsignificant differences in anglès

Studies using nonplatinum-based chemotherapy regimens had nonsignificant differences in OS.

Pre-operative adrenaline levels were slightly reduced in all drug therapy groups ( nonsignificant differences), while the levels noradrenaline were not significantly different among the groups.

Nonsignificant differences are evident for the number of awakenings per hour and the percentage of stage 1 shifts.