Variables | When measured | How measured | Reliability and validity |
---|---|---|---|
Ambulation activity | Continuously; 6 times a second on each resident by a RTLS technology; triangulated location and motion data from wristband worn by resident and sensors mounted throughout CLC’s | Path characteristics: 1) Time spent walking in a path (at least 60 s of uninterrupted walking separated by at least 30 s of non-ambulatory intervals before and after the path) 2) Distance covered in a path (distance, in miles, where there is at least 60 s of uninterrupted walking) 3) The number of paths in a week (count) | 1) & 2) Spearman correlation with Tinetti Gait subscale (0.32–0.35) and Tinetti Balance subscale 0.37–0.40 (unpublished data) − 95% concordance in accuracy in ambulatory path, correct location, accurate time with direct observation (observational study, unpublished data) |
Tortuosity (random changes in direction during movement measured by deviation from a straight line measured from 0–1) | Spearman correlation with stride-time variability measured by a Gait–Rite mat (0.30)2 Spearman correlation with Mini-Mental State Exam (− 0.47)2 | ||
1) Time (minutes) and 2) distance walking (miles) | Spearman correlation with Tinetti Balance subscale 1) (0.11–0.40) Tinetti Gait subscale 2) 0.35 (unpublished data) | ||
Gait speed | Spearman correlation with the Tinetti Performance Oriented Mobility Assessment (0.39) (unpublished data) | ||
 |  | Lapping and pacing patterns first identified by hand-coding of 2-D visualizations (e.g., gif files), then using Rubine classifiers to identify patterns | Inter-rater reliability for observations of these patterns in this setting and population (0.89) |