Metabolic data revisited

At work there was another opportunity to get some health checks done.  After getting some fluctuating results earlier in the year, I was curious to see what the data would show today.

Interesting...

Blood pressure: 2 July, 112/78 --- 28 August, 118/48 --- 22 October, 112/70

Cholesterol: 2 July, 4.65 --- 28 August, 3.22 --- 22 October 5.35

At this point I'm confused, and a little bit suspicious.  How can the readings be fluctuating so wildly, particularly the cholesterol?  The nurse today said that readings can vary and that lab tests are needed for anything definitive.

 

I'm taking the data with a pinch of salt, and never mind the attendant risk of raised blood pressure.