Since the new test has a very high sensitivity, that translates to that if the test is negative then there is a high likelihood that you can rule out falls risk. This means there should not be very many false negatives. There could be a lot of false positives however with a specificity of 25%; in other words, when the test is positive you can’t feel confident to rule in falls risk.
Here are a couple threads from our PCS Advantage forums that discuss sensitivity and specificity a little further that might be helpful: