Action on Elder Abuse hailed the newspaper's coverage of the plight of 1 million abused pensioners as the best media attention it has ever received.
The tabloid devoted five pages over three days to the charity's campaign on abuse in UK nursing homes. It began with a front page story under the headline 'Britain couldn't care less', and used 10 case studies inside to illustrate elders' distress.
Gary FitzGerald, the charity's chief executive, said he had taken part in lots of media interviews after the Health Select Committee report was published last month. He added that the coverage had "at last enabled the charity to connect with the public and more decisively, they have been roused to reach out to us for information."
The Mirror coverage included a coupon for readers to sign up to the charity's petition to put the issue at the top of the Government's social care agenda.
The charity has received more than 10,000 signatures so far, which it will add to its ongoing petition, and which it hopes to present to the Government soon.
"We want the Government to develop a strategy and act upon the recommendations made in the recent inquiry," added FitzGerald.