I looked into it and the study is kind of bizarre:
"Children whose mothers had worked during the study were compared with children whose mothers had not worked. Children whose mothers worked full or part-time were more likely to eat fruit or vegetables between meals than other snacks, to eat three or more portions of fruit a day, to take part in organised exercise on three or more days a week, and to be driven to school.
In addition, children whose mothers worked full or part-time were less likely to snack on crisps or sweets between meals.
However, taking into account factors that could affect the results (such as ethnicity, socioeconomic status, highest maternal educational attainment, whether they were lone parents, their age at the birth of the enrolled child, and number of children in the household) reversed many of these relationships.
These adjusted analyses showed that children whose mothers worked full or part-time were more likely to drink mainly sweetened beverages between meals and to use the TV or computer for at least two hours a day. Children whose mothers worked 21 hours or more a week were less likely to eat fruit or vegetables between meals than other snacks, and less likely to eat three or more portions of fruit per day.
The relationship with being driven to school remained the same, with children whose mothers worked full or part-time being more likely to be driven to school."
So basically if you work full time your kids are more likely to drink sweetened drinks, watch TV, and be driven... but they're also more likely to eat fruit and be in sports.
Like, whatever.
ETA: Info here:
http://www.nhs.uk/news/2009/09Septem...-children.aspx