[adamredwoods]

>> Each 30 minutes higher MVPA was associated with a 4% reduction in the risk of all-cause dementia

So 4% reduction means... complete chance of dementia? Or it helps 4 in 100 people? How can that be applied? I think that number lacks qualitative information. Conclusions like this are vague. I could see a number like 33% or 50% being more easily applied for expected results. 4% seems within a margin of error.

[IshKebab]

I think they're saying each 30 minutes of exercise per week is associated with a 4% reduction of risk. So if you do 3 hours per week it's a 36% reduction (roughly).

[wjnc]

Glance at the study? 90k 63+ yr olds over 4.4 years followed where 700+ developed dementia.