Table 2:
Consistency and rate of change in physical activity across time (n=571)
| Variable | Correlation: Baseline with 3-mos |
Intraclass Correlation | Unadjusted Slope* | P-value for Slope |
Adjusted Slope* | P-value |
|---|---|---|---|---|---|---|
| TAC | 0.86 | 0.86 | −43,353 | <.0001 | −42,019 | <0.0001 |
| Active Time | 0.83 | 0.83 | −7.86 | <0.001 | −7.67 | <0.0001 |
| ASTP | 0.85 | 0.82 | 0.003 | 0.010 | 0.003 | 0.017 |
TAC = total activity counts, Active Time = minutes per day spent at or above an activity threshold of 1853 counts/min, ASTP = Activity fragmentation defined by the active-to-sedentary transition probability
*
Time effect from linear mixed effects models with random intercept and slope. Age, sex, and race (non-white vs. white), BMI, number of comorbidities, and history of falls (fell vs. did not fall) were adjusted to derive the adjusted slope.