Clinical mobility metrics estimate and characterize physical activity following lower-limb amputation

Table 5 Optimal cut-points to identify adults with LLA at risk of sedentarism

	Cut-point	Sensitivity (%)	Specificity (%)	Positive LR^†	Negative LR^‡	Post-test probability for positive test^§ (%)	Post-test probability for negative test^¶ (%)
PEQ-MS	41.0	87.0	58.3	2.1	0.2	58.0	11.6
L-test (s)	25.2	78.0	83.3	4.7	0.3	83.8	21.0
10mWT (m/s)	0.94	65.2	91.7	7.9	0.4	75.5	16.5
6MWT (m)	363.4	73.9	91.7	8.9	0.3	85.4	16.5

LR likelihood ratio, PEQ-MS Prosthesis Evaluation Questionnaire-Mobility Subscale, 10mWT 10-m Walk Test, 6MWT 6-min Walk Test, m meters, sec seconds
Pre-test probability of sample was 66%
^†Ranges from 0 to infinity. Larger values indicate usefulness of measure in classifying adults at risk of sedentarism post-LLA
^‡Ranges from 0 to 1. Smaller values indicate usefulness of measure in classifying adults not at risk of sedentarism post-LLA
^§Probability an adult post-LLA is at risk of being sedentary given a test score at or below determined cut-point for PEQ-MS, 10mWT, 6MWT, and at or above determined cut-point for L-Test
^¶Probability an adult post-LLA is not at risk of being sedentary given a test score at or above determined cut-point for PEQ-MS, 10mWT, 6MWT and at or below determined cut-point for L-Test

ISSN: 2052-1847