[pygy_]

The vaccinnated group was 1 year older on average, and had mode cardiovascular risk factors.

Covid has long term health consequences, and these are proportional to the severity of the acute infection.

People who died of a stroke of a heart infarction 6 months down the line were not counted as "covid death", even though covid is known to increase their incidence in the next year.

[pygy_]

Another factor that may play a role: the people who chose not to take the vaccine may be prone to taking bad decisions more broadly, leading to a higher mortality rate.

[oldgradstudent]

If true, that means the groups are different in many other aspects other than the vaccine.

The study does not control for the differences. No causality can be inferred.

[disgruntledphd2]

I mean, it's plausibly something around trust in medical authorities which correlates with both vaccine and other treatment refusal.