Table 3.
Statistically Significant Predictors of “Hourly Frequency” (a) and “Daily Duration” (b) Captured by the WIMU-GPS and Diary
| a. “Hourly frequency” captured by the WIMU-GPS and Diary | ||||
|---|---|---|---|---|
| Participant characteristics | Higher Diary | Agreement | ||
| Incidence rate ratio (eβ) | p | Incidence rate ratio (eβ) | p | |
| Age α | 0.97 | .0336 † | 1.06 | .0065 † |
| Gender (ref: women) | 0.69 | .0406 † | 1.135 | .6635 |
| Employment status α (ref: retired) | 1.66 | .0152 † | 0.398 | .0754 †† |
| Education (ref: graduate degree) | ||||
| < High school | 0.76 | .3919 | 1.331 | .4714 |
| High school graduate | 2.41 | .1487 | 0.880 | .7703 |
| Some college | 0.59 | .3891 | 3.286 | .0105 † |
| College diploma | 1.44 | .2057 | 0.924 | .8654 |
| Undergraduate degree | 1.31 | .3703 | 1.044 | .9264 |
| Postgraduate program | 2.41 | .0745 †† | 5.17 × 10−11 | .9999 |
| Income α (ref: >$90,000) | ||||
| 0–$19,999 | 0.55 | .1005 †† | 1.727 | .2799 |
| $20,000–$39,999 | 0.6903 | .2926 | 1.221 | .7079 |
| $40,000–$59,999 | 0.781 | .4391 | 1.061 | .9085 |
| $60,000–$89,999 | 1.78 | .0570 †† | 0.915 | .8743 |
| Years since diagnosis | 0.95 | .0077 † | 1.027 | .1671 |
| Impact of PD on dimensions of daily living (PDQ-39 scores): | ||||
| 1. Mobility α | 0.992 | .0727 †† | 1.006 | .2698 |
| 2. Activity of daily living α | 0.99 | .0470 † | 1.010 | .1203 |
| 3. Emotional well being | 0.9966 | .5293 | 0.992 | .3294 |
| 4. Perceived stigma | 0.988 | .0557 †† | 1.016 | .0210 † |
| 5. Social Support | 1.009 | .1571 | 0.987 | .2804 |
| 6. Cognition | 0.991 | .0717 †† | 1.004 | .5415 |
| 7. Communication | 0.997 | .5785 | 1.002 | .7497 |
| 8. Bodily discomfort α | 0.992 | .0555 †† | 0.998 | .7395 |
| 9. Overall quality of life α | 0.989 | .0919 †† | 1.0055 | .5367 |
| b. “Daily duration” captured by the WIMU-GPS and Diary | ||||
| Higher WIMU-GPS | Higher Diary | |||
| Participant characteristics | Incidence rate ratio (e β) | p | Incidence rate ratio (e β) | p |
| Age α | 1.0078 | .3121 | 0.974 | .0552 †† |
| Employment status α (ref: retired) | 0.748 | .0482 † | 1.932 | .0007 † |
| Income α (ref: >$90,000) | ||||
| 0–$19,999 | 0.972 | .8722 | 1.165 | .7147 |
| $20,000–$39, 999 | 0.833 | .3208 | 1.920 | .1000 †† |
| $40,000–$59, 999 | 0.866 | .3983 | 1.709 | .1641 |
| $60,000–$89,999α | 0.817 | .2707 | 2.015 | .0746 †† |
| Residential setting (ref: rural, outside of town) | ||||
| Urban | 0.944 | .7004 | 1.157 | .5336 |
| Suburban | 1.099 | .5463 | 0.740 | .2835 |
| Rural, in town | 1.134 | .3561 | 0.662 | .0929 †† |
| Impact of PD on dimensions of daily living (PDQ-39 scores): | ||||
| 1. Mobility α | 1.003 | .1553 | 0.987 | .0100 † |
| 2. Activity of daily living α | 1.004 | .1141 | 0.986 | .0060 † |
| 3. Emotional well being | 1.000 | .9982 | 0.9995 | .9264 |
| 4. Perceived stigma | 1.002 | .4522 | 0.993 | .2068 |
| 5. Social Support | 0.998 | .6674 | 1.005 | .4726 |
| 6. Cognition | 1.001 | .5691 | 0.995 | .2992 |
| 7. Communication | 1.002 | .5079 | 0.995 | .3131 |
| 8. Bodily discomfort α | 1.002 | .3119 | 0.993 | .0782 †† |
| 9. Overall quality of life α | 1.004 | .3084 | 0.988 | .0735 †† |
Note: Significant predictors of higher WIMU-GPS recordings were not found for “hourly frequency.” Significant predictors of agreement between the measurements were not assessed for “daily duration.” PD = Parkinson’s disease.
†Significant at p = .05, p = .01. ††Significant at p = .1. αCovariate was significant for both community mobility outcomes.