OTTAWA — Prime Minister Justin Trudeau of Canada has repeatedly denied accusations that he acted inappropriately with a young reporter at a charity event 18 years ago. On Friday, he said his accuser might have experienced their interaction differently.

“I do not feel that there was any inappropriate action of any type,” Mr. Trudeau said in an interview with the Canadian Broadcasting Corporation’s Toronto radio station. “But, and this is the really important thing, it is not just my experience that matters in this.”

He added, “The way the same interaction can be experienced by different people is a really important thing to get our minds around.”

The accusation that Mr. Trudeau, Canada’s prime minister since 2015, groped the reporter when he was a schoolteacher and living in British Columbia appeared in 2000 in an unsigned editorial published by The Creston Valley Advance, a small newspaper in that province.