Table 2. Number of Correctly Reidentified Matches in Testing Data With Physical Activity Data Partially Aggregated Into 20-Minute Intervals.
| Machine Learning Algorithm | No. (%) of Adultsa | No. (%) of Childrena | ||
|---|---|---|---|---|
| Demographics Only | Demographics With Physical Intensity | Demographics Only | Demographics With Physical Intensity | |
| NHANES 2003-2004 | ||||
| Linear SVM | 3880 (81.2) | 4043 (85.6) | 1496 (61.6) | 1695 (69.8) |
| Random Forest | 4478 (94.9) | 2120 (87.4) | ||
| NHANES 2005-2006 | ||||
| Linear SVM | 3827 (80.3) | 4041 (84.8) | 1514 (59.6) | 1705 (67.2) |
| Random Forest | 4470 (93.8) | 2172 (85.5) | ||
Abbreviations: NHANES, National Health and Nutrition Examination Survey; SVM, support vector machine.
a
P < .001.