. Author manuscript; available in PMC: 2017 Dec 14.

Published in final edited form as: J Epidemiol Community Health. 2017 Sep 25;71(12):1191–1197. doi: 10.1136/jech-2017-209769

Table 2.

Fall risk classification table based on logistic regression^a

Classified	Fell	Did not fall	Total
High risk^b	30.3%	18.5%	48.9%
Low risk	16.4%	34.8%	51.1%

Total	46.7%	53.3%	100%

Sensitivity = .65	Specificity = .65	PPV = .62	NPV = .68

Notes:

Predicted probabilities from logistic regression of any fall over four follow-up waves on STEADI fall risk category and age, gender, race/ethnicity, and education.

Predicted probability of falling ≥ .5

PPV: positive predictive value; NPV: negative predictive value