Table 3.
Comparative Analysis of the Strength of the Associations Between ASTP and Total Volume of Physical Activity (TLAC) With (A) Usual Gait Speed (m/s), (B) Perceived Fatigability (Borg RPE), (C) Time to Walk 400 m (seconds), and (D) Expanded SPPB score
| Outcome | (A) Gait Speed (m/s) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Model 1 | Model 2 | Model 3 | Model 4 | |||||||||
| Std. β | SE | p | Std. β | SE | p | Std. β | SE | p | Std. β | SE | p | |
| TLAC | 0.11 | 0.04 | .004 | −0.05 | 0.06 | .37 | 0.11 | 0.04 | <.01 | |||
| ASTP | −0.17 | 0.04 | <.001 | −0.21 | 0.06 | <.001 | ||||||
| Adjusted ASTP | −0.13 | 0.03 | <.001 | |||||||||
| (B) Perceived Fatigability (RPE) | ||||||||||||
| Model 1 | Model 2 | Model 3 | Model 4 | |||||||||
| Std. β | SE | p | Std. β | SE | p | Std. β | SE | p | Std. β | SE | p | |
| TLAC | −0.16 | 0.04 | <.001 | −0.05 | 0.06 | .37 | −0.16 | 0.04 | <.001 | |||
| ASTP | 0.18 | 0.04 | <.001 | 0.14 | 0.06 | .01 | ||||||
| Adjusted ASTP | 0.09 | 0.04 | .01 | |||||||||
| (C) Time to Walk 400 m (seconds) | ||||||||||||
| Model 1 | Model 2 | Model 3 | Model 4 | |||||||||
| Std. β | SE | p | Std. β | SE | p | Std. β | SE | p | Std. β | SE | p | |
| TLAC | −0.16 | 0.03 | <.001 | −0.04 | 0.05 | 0.48 | −0.16 | 0.03 | <.001 | |||
| ASTP | 0.19 | 0.03 | <.001 | 0.17 | 0.05 | <.001 | ||||||
| Adjusted ASTP | 0.10 | 0.03 | <.001 | |||||||||
| (D) Expanded SPPB Score | ||||||||||||
| Model 1 | Model 2 | Model 3 | Model 4 | |||||||||
| Std. β | SE | p | Std. β | SE | p | Std. β | SE | p | Std. β | SE | p | |
| TLAC | 0.13 | 0.04 | <.001 | 0.02 | 0.05 | 0.67 | 0.13 | 0.04 | <.001 | |||
| ASTP | −0.16 | 0.04 | <.001 | −0.14 | 0.05 | <.01 | ||||||
| Adjusted ASTP | −0.09 | 0.03 | <.01 | |||||||||
Note: Model 1 includes TLAC, Model 2 includes ASTP, Model 3 includes TLAC and ASTP, and Model 4 includes TLAC and ASTP adjusted for total volume. All models are adjusted for age, sex, race, smoking history, height, weight, and history of cardiovascular disease, stroke, peripheral neuropathy, hypertension, diabetes, cancer, and lower extremity arthritis pain. ASTP = Active-to-Sedentary Transition Probability; RPE = rating of perceived exertion; SPPB = Short Physical Performance Battery; TLAC = total log activity counts.