Correlations Between Questionnaire and Sensor Data
| Questionnaire | Speakingar2(PValue) | Physical Activity Scorebr2(PValue) | Walking Levelar2(PValue) | Stationaryar2(PValue) | Walking Upar2(PValue) | Walking Downar2(PValue) |
|---|---|---|---|---|---|---|
| CES-D = Center for Epidemiologic Studies–Depression; MCS = mental component score; PCS = Physical Component Score; SF-36 = 36-Item Short Form Health Survey; YPAS = Yale Physical Activity Survey. | ||||||
| a Fraction of time (speaking) or percentage of time (walking, stationary) spent in this activity. | ||||||
| b Weighted using the following weights: 0.6 for stationary, 3 for walking level, 5 for walking up, 1 for walking down, and −1.5 for unclassified. | ||||||
| SF-36 MCS | 0.86 (.03) | – | – | – | – | – |
| CES-D | −0.75 (.08) | – | – | – | – | – |
| Friendship Scale | 0.97 (.002) | – | – | – | – | – |
| YPAS hours | – | 0.79 (.02) | −0.50 (.21) | −0.68 (.07) | 0.80 (.02) | 0.72 (.43) |
| YPAS kcal/week | – | 0.82 (.01) | −0.52 (.18) | −0.60 (.12) | 0.82 (.01) | 0.65 (.08) |
| SF-36 PCS | – | −0.29 (.49) | 0.21 (.62) | 0.47 (.24) | −0.56 (.15) | 0.18 (.66) |