Life expectancy at birth is a particularly limited measure of health-care performance across nations, because it generally fails to account for such important variables as lifestyle, culture, income level, and educational achievement. Life expectancy at older ages, such as at 65, gives a clearer picture — though it does not eliminate the confounding distortion of non-medical factors — and using that measure, the apparent life expectancy gap between the U.S. and other comparable nations narrows. In fact, if one goes further out on the age curve to age 80 and over, one finds that the U.S. probably leads the developed world in life expectancy...
study published earlier this month in Demography finds that at age 55 and beyond, Americans are sicker by far than the English, yet older Americans don’t die earlier than their British counterparts: Death rates were equivalent for 55-to-64-year-olds, and beyond age 65, Americans had a slightly greater probability of survival. Why is this so? Perhaps because the U.S. health-care system diagnoses and treats illnesses (particular among the elderly) more aggressively than does the National Health Service — though, of course, all that extra screening and more intensive treatment costs more money.