At the start of the project, the respondents were asked to award points out of seven to reflect the extent to which they felt part of their neighbourhood, could rely on their neighbours in a pinch, could trust their neighbours, and found their neighbours to be friendly.

When they crunched the numbers at the end of the study, the team found that for every point they had awarded out of seven, an individual had a reduced heart attack risk over the four-year study period.

People who gave a full score of seven out of seven had a 67 percent reduced heart attack risk compared to people who gave a score of one, study co-author Eric Kim told AFP, and described the difference as “significant”.

This was “approximately comparable to the reduced heart attack risk of a smoker vs a non-smoker,” he said.