Table 3.
Lab-based and accelerometer-based measurements of physical function and activity patterns.
| Measurements | HIV+ (n=23) | HIV− (n=23) | P valuea | ||
| Lab-based assessments, mean (SD) | |||||
| 6-minute walk test gait speed (m/s) | 1.51 (0.23) | 1.53 (0.31) | .39 | ||
| Predicted metabolic equivalentsb | 2.93 (0.30) | 3.04 (0.41) | .15 | ||
| Accelerometer assessments, mean (SD) | |||||
| Gait speed (m/s)c | 0.41 (0.11) | 0.48 (0.14) | .04 | ||
| Predicted metabolic equivalentsc | 1.03 (0.31) | 1.24 (0.42) | .03 | ||
| Activity patternsd, n (%) | |||||
| Week 1: Q1 (Low, %) | 67 (12) | 58 (11) | .01 | ||
| Week 1: Q2-Q3 (Moderate, %) | 22 (7) | 26 (10) | .04 | ||
| Week 1: Q4 (Intense, %) | 11 (9) | 15 (11) | .11 | ||
| Week 1,2,3: Q1 (Low, %) | 68 (13) | 60 (10) | .01 | ||
| Week 1,2,3: Q2-Q3 (Moderate, %) | 23 (7) | 28 (10) | .02 | ||
| Week 1,2,3: Q4 (Intense, %) | 9 (9) | 12 (12) | .19 | ||
aP values were determined by one-sided t tests.
aAdjusted for height.
cBased on the following formula calculation for gait speed: ([steps×height×0.414]/60) [34]] and METs: 1+1/2×speed (km/h)+0.086×speed (km/h) ×slope (in %).
dPercent time spent in lowest (Q1), moderate (Q2-Q3), intense (Q4) quartiles of activity, as assessed using the maximum intensity from each week or from the overall period (21 days).