Three unions pumped more than $100,000 into two local campaigns for state Senate with mixed results, according to a state study.

The state Office of Campaign and Political Finance found that the Massachusetts Teachers Association and the Service Employees International Union spent $65,718 in helping Sen. James Timilty, D-Walpole, get re-elected.

The service employees and the Massachusetts Nurses Association spent $44,657 on behalf of Needham Democrat Sara Orozco, who lost to Sen. Scott Brown, R-Wrentham.

Most of the money went toward flyers touting the candidates' positions on health care and education issues.

The spending was on what the law calls independent expenditures because it is not coordinated with the candidates. There are no limits on what independent groups can spend.

The state office said the three unions spent a total of $525,306 statewide on the election, almost all of it going to support Democrats.

Timilty, who defeated Republican Jon Rockwood, received more help than any other state candidate, while Orozco was second.