Graeme and Gwenda Swinney. Photo / Martin Sykes

Graeme and Gwenda Swinney. Photo / Martin Sykes

Taking in a grandchild has split up the marriages of one in every seven New Zealand couples who have had to do this.

A survey of 205 members of the Grandparents Raising Grandchildren Trust found that 28 marriages broke up as a result of taking in a child - 13.7 per cent of the 188 people who answered this question.

One grandmother told researcher Jill Worrall: "Just recently after 38 years of marriage we separated, and caring for a grandchild may have partially contributed to this."

Another told her: "My husband of 36 years had no patience with the children so it was either him or them and I chose the children."

That grandmother explained: "It was hard but there was really no choice [what they had come from]."

The survey found that children came into their grandparents' care because their parents were drug addicts (42 per cent), neglectful (37 per cent), alcoholics (26 per cent), or suffered domestic violence (25 per cent), mental illness (23 per cent) or other problems such as imprisonment, physical illness or prostitution or poverty.

Many parents had more than one of these problems.

Mrs Worrall, a research associate at Massey University, said 57 per cent of the grandparents had to change their work patterns when they took in grandchildren, either working fewer hours so they could care for the children or longer hours so they could pay for them.

A tenth had gone back to work from retirement to pay for the children, but still struggled to make ends meet at a time of life when income usually falls and health costs rise.

One grandmother said: "I go without food to feed my grandson, also clothes, haircuts. I can't do volunteer work because we look so raggedy away from children's activities [paint-stained clothes etc]."

Another couple had had to sell their retirement home, cash in all their savings and were "now broke".

Christchurch grandparents Gwenda and Graeme Swinney, both now 70, have brought up two grandchildren now aged 18 and 14 as well as helping to care for the children's mother, an alcoholic. Another child of the same mother is being brought up by an aunt.

"All the children come with traumas," Mrs Swinney said.

"Even if there are no real big hassles, it's just having to live with an old grandmother and an old grandfather. Our values are just so different.

"When we were 18 we had to be home at midnight. Now they only go out at midnight. We get phone calls at 2am to 'come and pick me up now'."