Table 3.
The psychometric properties of slowness for the FRIED-Q compared to the FRIED-P
| Performance-based test 15ft Walk time |
Total | Positive predictive value | Negative predictive value | ||
|---|---|---|---|---|---|
| + | − | ||||
| Replacement questions | |||||
| + | |||||
| N | 39 | 4 | 43 | ||
| % | 47.0 | 3.5 | 21.9 | 90.7 | |
| Slowness | |||||
| − | |||||
| N | 44 | 109 | 153 | ||
| % | 53.0 | 96.5 | 78.1 | 71.2 | |
| Total | |||||
| N | 83 | 113 | 196 | ||
| Sensitivity | |||||
| % | 47.0 | ||||
| Specificity | |||||
| % | 96.5 | ||||
FRIED-P stands for the Fried Phenotype with slowness and weakness operationalized as performance-based tests. FRIED-Q stands for the Fried Phenotype with slowness and weakness operationalized as self-report questions. + indicates a participant’s slowness was higher than the cutoff determined by Fried Phenotype or had a higher score than the cutoff on the replacement questions determined by Op het Veld and colleagues (see Online Resource 2), − indicates a participant's slowness was lower than the cutoff determined by Fried Phenotype or had a lower score than the cutoff on the replacement questions determined by Op het Veld and colleagues