Most killers were male. Most of the couple-related victims (76 per cent) were women.
Maori were over-represented among killers (34 per cent) and victims (39 per cent), compared with their share of the population (15 per cent). The most common factors in the couple-related deaths were threatened or recent separation, previous violence, alcohol and drug abuse, and jealousy.
Ms Tolmie said the concern about offenders going home after coming out of jail was a "very preliminary" finding after the first three in-depth reviews.
"The process we are employing is a no-blame process."
This year's business plan for the Corrections Department's rehabilitation and reintegrative services already promises to "review domestic violence interventions to confirm that they reduce reoffending" and to "review reintegrative planning for high-risk offenders".
The review committee said the three pilot reviews also pointed to a need to make screening for family violence "a routine part of maternity care". Nineteen of the 49 children who died from family violence between 2002 and 2008 were under 1.
The committee said police also needed to "continue to address the quality and amount of family violence training offered to new recruits and existing officers" so they could identify risks when called to domestic disputes.
Ms Tolmie said the ethnic imbalance in the statistics pointed to "major structural concerns" in society.
OFFENDERS
Family violence perpetrators, 2002-2008
Couple-related victims
Men 86 per cent
Women 14 per cent
Child victims
Men 60 per cent
Women 40 per cent
All perpetrators
Maori 34 per cent
European 30 per cent
Asian 11 per cent
Pacific 8 per cent
Other 2 per cent
Unknown 15 per cent