I assume the WHO relies on local census & medical data to generate these statistics (the Reuters piece doesn't have a citation on ths) so I'd take this data with a grain of salt until we hear more details about the methodology.
I agree. Although, it also wouldn't be terribly surprising for China to pass the US on this metric. When you look at the obesity numbers: US 36%, New Zealand 31%, Canada 29%, Australia 29%, UK 28%, Israel 26%, Ireland 25% Thailand 10%, Indonesia 7%, China 6%, Philippines 6%, South Korea, 5%, Vietnam 2% Vietnam's life expectancy will overtake the US in the next 10-15 years as well most likely (they're about three year…
"When you look at the obesity numbers" ...
Unfortunately, theses 'lifespan' measurements have a lot to do with violent crime, car accidents, suicides, war deaths etc. - i.e. things that aren't so much about health than otherwise.
It's why average lifespan isn't necessarily a very good measure of health outcomes.
I think US is down due to overdoses, which is a kind of health issues, but not necessarily a regular measure of diet and quality of regular medicine, it's an epidemic.