Question

A study compared the predictive values of two instruments, the Morse Fall Scale (MFS) and the Heindrich II Fall Risk Model (HFRM). 1815 eligible patients on the medical and surgical units were screened for falls within two hours of admission using both instruments. Information on fall occurrence for each patient was obtained from the quarterly reports. Sensitivity, specificity, positive predictive value (PPV) for each instrument were presented in the table. Which of the following statement(s) is/are correct interpretation(s)of the test results?  

		Patient	Fell
		Yes	No	sensitivity	specificity	PPV
MFS	Score>51	24	169
	Score>51	41	1581	36.9%	90.3%	12.4%
	Score>5	36	182	55.3%	89.3%	16.5%
HFRM	Score<5	29	1568

Select one or more:

1. The specificity value for the HFRM indicates the scale can correctly identify about 89% of patients who did fall.
2. The sensitivity value for the MFS indicates the scale correctly identified about 37% of patients who did not fall.
3. The PPV value for HFRM tells us of the patients identified by the scale as being at risk,16% did actually fall
4. The sensitivity value for the MFS indicates the scale correctly identified about 37% of fall cases
5. The specificity value for the HFRM indicates the scale can correctly identify about 89% of patients who did not fall
6. The PPV value for HFRM tells us, of the patients identified by the scale as being not at risk, 16%

Answer 1

D, The sensitivity value for the MFS indicates the scale correctly identified about 37% of fall cases.
- Positive predictive value(PPV) percentage of patients with a positive test who actually have the risk.
- the specificity of a test indicates no fall test specificity.
-sensitivity is the ability of a test the individual did actually fall.