Helen MacDonald

Because you're being asked for that, but maybe those items are not getting enough prominence in that section or in the abstract.

So I guess you can always go in the tables and dig this out, but I think you just need a lot of expertise to piece those numbers together.

Are you going to get ranty now?

Did you have to do more maths?

And what would that mean?

So that's a bit where it gets.

So if you eat a teaspoon less... Yeah.

your systolic blood pressure would go down by about four millimetres of mercury in the short term.

It's like you're interviewing for another job, Carl, to join the research team.

How many teaspoons a day do we have on average?

So it's basically all of it?

They start hunting the salt.

I do.

This is about understanding what your test results mean.

And it's a paper that appeared in the education section of the BMJ this week by James McCormack and Daniel Holmes.

And they are looking at how accurate common test results are.

And what they say is quite intriguing.

I've never thought about this deeply enough before, I don't think, was that there are three major things that sort of throw imprecision into the test results that we see.

They're sort of quite mechanical things like how the test sample is collected and handled and transported and stored.

So things like leaving your blood test in a hot box above a radiator or something being a bad idea, etc.