In an analysis of 755,000 divorces in 11 different countries, divorce was associated with a reduction in

The answer to this question is life expectancy.

Life expectancy is defined as the average amount of time an organism (in this case, a human being) is expected to live based on his or her demographic factors, such as age and gender.

Thus, based on the conducted analysis in the question, it can be said that a divorced individual will not live as long as a married individual. However, you need to remember that this is correlational research, thus it cannot be said that divorce causes people to die earlier.