Is the positivity rate being correctly calculated?Wednesday, September 15, 2021
It seems to me that either we are being given incorrect information — which I very much doubt — or someone at the Ministry of Health is not clear as to how the daily positivity rates are to be calculated.
I had noticed in the past what appeared to be discrepancies on numerous occasions, and so I decided to check the exact figures given on Television Jamaica (TVJ) for Sunday, September 12.
It was stated that there were 594 new cases from 2,136 tests, or a positivity rate of 36.2 per cent. But this is completely wrong. If the number of new cases and the number of tests done are both accurate, then the positivity rate is in fact 27.8 per cent, that's a huge difference of 8.4 per cent – assuming that the figures given on TVJ were correct.
There is only one way to calculate the positivity rate, and that is by dividing the number of new cases by the number of tests done. So, in this case, 594 divided by 2,136 equals 27.8 per cent.
If anyone can tell me of any other formula for calculating the percentage rate, I would be happy to hear it.
The bottom line is that the public must be given accurate figures at all times.
Now you can read the Jamaica Observer ePaper anytime, anywhere. The Jamaica Observer ePaper is available to you at home or at work, and is the same edition as the printed copy available at https://bit.ly/epaper-login