Table 2.
Participant characteristics at baseline by age
| Age 60–69 N=286a | Age ≥ 70 N=127a | pb | |||
|---|---|---|---|---|---|
| Mean or % | SD or N | Mean or % | SD or N | ||
| Weight, kg | 95.4 | 16.2 | 88.5 | 15.6 | <.001 |
| BMI, kg/m2 | 35.3 | 5.6 | 33.6 | 5.3 | .003 |
| BMI category | .008 | ||||
| Overweight (25–<30 kg/m2) | 16% | 47 | 28% | 35 | |
| Obesity class I (30–<35 kg/m2) | 36% | 104 | 34% | 43 | |
| Obesity class II (35–<40 kg/m2) | 24% | 68 | 27% | 34 | |
| Obesity class III (≥40 kg/m2) | 23% | 67 | 12% | 15 | |
| Waist circumference, cm | 114.7 | 13.3 | 109.6 | 13.4 | <.001 |
| Energy, kcal | 1607 | 755 | 1515 | 593 | .23 |
| Fat, % kcal | 40.2 | 7.2 | 39.3 | 6.3 | .22 |
| Fiber, g/1000 kcal | 9.6 | 3.6 | 10.6 | 3.6 | .02 |
| Healthy Eating Index-2010 | 65.4 | 10.3 | 68.4 | 10.6 | .009 |
| HEI-2010 category | .12 | ||||
| Poor (0–50) | 9% | 25 | 6% | 7 | |
| Needs improvement (51–80) | 86% | 240 | 84% | 102 | |
| Good (81–100) | 5% | 14 | 10% | 12 | |
| PASE physical activity scored | 99.9 | 64.6 | 90.9 | 52.8 | .17 |
| Six-minute walk, m | 363.9 | 94.5 | 338.8 | 101.0 | .02 |
| Chair stands in 30 sec | 8.8 | 3.4 | 8.5 | 4.0 | .40 |
| WOMAC global score (0–96)c | 28.5 | 17.7 | 22.9 | 16.1 | .002 |
| Pain subscale (0–20) | 6.1 | 4.0 | 4.6 | 3.8 | <.001 |
| Stiffness subscale (0–8) | 3.3 | 1.7 | 2.7 | 1.8 | .002 |
| Physical functioning subscale (0–68) | 19.1 | 13.1 | 15.6 | 12.0 | .01 |
| Anxiety/depression (0–10)e | 2.6 | 1.7 | 2.2 | 1.7 | .01 |
| Total WEL score (0–180)f | 130.7 | 34.9 | 141.5 | 26.7 | .002 |
| Self-efficacy for exercise (1–10)f | 7.6 | 2.0 | 7.8 | 1.9 | .19 |
a.
Ns differ for some variables due to missing data; see Table 1
b.
From t-tests with pooled variance for continuous variables and chi-square tests for categorical variables
c.
A higher score indicates greater difficulties due to OA
d.
A higher score indicates greater physical activity
e.
A higher score indicates greater anxiety/depression
f.
A higher score indicates greater self-efficacy.