Table 5 Frequencies and percentages of the relationship between mothers' response to victimisation questions and fathers' response to perpetration questions of intimate partner violence (IPV) and mothers' response to perpetration questions and fathers' response to victimisation of IPV by the three major maternal ethnic groups (585 couples) together with Fisher's exact test p Value testing the distributions between groups.

	Mother a victim, father a perpetrator	Mother a victim, father not a perpetrator	Mother not a victim, father a perpetrator	Mother not a victim, father not a perpetrator	Fisher's p Value
Verbal aggression					<0.001
Samoan	264 (75)	12 (3)	71 (20)	4 (1)
Tongan	94 (65)	42 (29)	4 (3)	4 (3)
Cook Island Maori	77 (86)	6 (7)	7 (8)	0 (0)
Any physical violence					<0.001
Samoan	16 (5)	100 (28)	12 (3)	223 (64)
Tongan	6 (4)	8 (6)	13 (9)	117 (81)
Cook Island Maori	11 (12)	22 (24)	3 (3)	54 (60)
Severe physical violence					<0.001
Samoan	4 (1)	57 (16)	4 (1)	286 (81)
Tongan	1 (1)	7 (5)	6 (4)	130 (90)
Cook Island Maori	4 (4)	18 (20)	2 (2)	66 (73)

	Mother a perpetrator, father a victim	Mother a perpetrator, father not a victim	Mother not a perpetrator, father a victim	Mother not a perpetrator, father not a victim	Fisher's p Value
Verbal aggression					<0.001
Samoan	275 (78)	28 (8)	43 (12)	5 (1)
Tongan	95 (66)	46 (32)	2 (1)	1 (1)
Cook Island Maori	77 (86)	8 (9)	5 (6)	0 (0)
Any physical violence					<0.001
Samoan	13 (4)	128 (36)	7 (2)	203 (58)
Tongan	8 (6)	11 (8)	5 (3)	120 (83)
Cook Island Maori	8 (9)	36 (40)	3 (3)	43 (48)
Severe physical violence					<0.001
Samoan	7 (2)	74 (21)	3 (1)	267 (76)
Tongan	4 (3)	8 (6)	1 (1)	131 (91)
Cook Island Maori	1 (1)	26 (29)	3 (3)	60 (67)

Values are n (%).