This is a cohort study conducted over 15 years. You can't really criticize it only based on those numbers, at least not without looking at similar numbers from other cohort studies with the same length.
I tend to ascribe some value to "It was published in the peer-reviewed British Medical Journal."
Additional thought: Especially because it is essentially supporting the null hypothesis.
I tend to ascribe some value to "It was published in the peer-reviewed British Medical Journal."
Additional thought: Especially because it is essentially supporting the null hypothesis.