Table 2.
Partition and isotemporal substitution models for the association between accelerometer derived physical activity (scaled by 10 min) and average ascent time on stair climb (seconds)1 in the total cohort and after stratification by race/ethnicity (n = 1048).
| Adjusted2 Model (Total) | Adjusted Model2, 3 |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| White | Black | Chinese | Hispanic | Japanese | |||||||||
| Partition Models | |||||||||||||
| Estimate (95% CI) | p-value | Estimate (95% CI) | p-value | Estimate(95% CI) | p-value | Estimate (95% CI) | p-value | Estimate (95% CI) | p-value | Estimate (95% CI) | p-value | ||
| Sedentary | 0.003 (−0.002,0.01) | 0.19 | 0.002 (−0.01,0.01) | 0.64 | 0.005 (−0.01,0.02) | 0.29 | 0.007 (−0.01,0.02) | 0.29 | 0.006 (−0.02,0.03) | 0.57 | −0.002 (−0.01,0.01) | 0.81 | |
| Low-light | 0.002 (−0.01,0.01) | 0.96 | −0.004 (−0.02,0.01) | 0.55 | 0.019 (−0.004,0.04) | 0.10 | 0.017 (−0.01,0.04) | 0.16 | −0.043 (−0.09,0.01) | 0.10 | −0.006 (−0.02,0.01) | 0.49 | |
| High-light | −0.009 (−0.03,0.01) | 0.25 | −0.006 (−0.03,0.01) | 0.57 | −0.076 (−0.13,−0.02) | 0.01 | 0.002 (−0.04,0.04) | 0.92 | 0.039 (−0.05,0.12) | 0.36 | 0.015 (−0.02,0.05) | 0.34 | |
| MVPA | −0.023 (−0.04,−0.005) | 0.01 | −0.022 (−0.04,−0.0001) | 0.043 | 0.022 (−0.05,0.09) | 0.52 | −0.049 (−0.09,−0.01) | 0.03 | −0.064 (−0.20,0.07) | 0.35 | −0.035 (−0.07,−0.001) | 0.04 | |
| Isotemporal Substitution Models | |||||||||||||
| Adjusted Model (Total)2 | Adjusted Model2, 3 | ||||||||||||
| White | Black | Chinese | Hispanic | Japanese | |||||||||
| Estimate (95% CI) | p-value | Estimate (95% CI) | p-value | Estimate (95% CI) | p-value | Estimate (95% CI) | p-value | Estimate (95% CI) | p-value | Estimate (95% CI) | p-value | ||
|
Replacing Sedentary |
Low-light | 0.0001 (−0.10,0.01) | 0.81 | −0.005 (−0.02,0.01) | 0.39 | 0.014 (−0.01,0.04) | 0.27 | 0.011 (−0.01,0.03) | 0.37 | −0.049 (−0.10,0.001) | 0.06 | −0.005 (−0.02,0.01) | 0.57 |
| High-light | −0.015 (−0.03,0.01) | 0.05 | −0.007 (−0.03,0.01) | 0.45 | −0.082 (−0.13,−0.03) | 0.002 | 0.0004 (−0.04,0.03) | 0.81 | 0.032 (−0.05,0.11) | 0.42 | 0.017 (−0.01,0.05) | 0.24 | |
| MVPA | −0.026 (−0.04,−0.01) | <0.001 | −0.023 (−0.04,−0.003) | 0.03 | 0.016 (−0.05,0.08) | 0.63 | −0.056 (−0.10,−0.01) | 0.01 | −0.070 (−0.21,0.07) | 0.31 | −0.034 (−0.07,−0.001) | 0.05 | |
Stair climb test was not conducted at the Boston SWAN site (included Black and White women).
Model adjusted for age, site, BMI, overall health, interaction of BMI*overall health, difficulty paying for basics, and ever had osteoarthritis (total cohort and stratified by race/ethnicity).
P-values for the interaction between activity type and race/ethnicity group were: sedentary*race/ethnicity = 0.32, low-light*race/ethnicity = 0.004, high-light*race/ethnicity=<0.0001, MVPA*race/ethnicity = 0.0003.