Table 4 Concurrent validity for self-reported physical activity and accelerometer derived physical activity
Characteristics (n) | ≥ 150 min/week MVPA steppinga | ≥ 7000 steps/day | ≥ 5000 steps/day | |||
|---|---|---|---|---|---|---|
|  | Spearman’s rho | Kappa (95% CI) | Spearman’s rho | Kappa (95% CI) | Spearman’s rho | Kappa (95% CI) |
All (619) | 0.28 | 0.21 (0.15–0.28) | 0.31 | 0.25 (0.18–0.32) | 0.32 | 0.32 (0.22–0.42) |
Women (400) | 0.27 | 0.20 (0.13–0.28) | 0.30 | 0.23 (0.15–0.31) | 0.31 | 0.30 (0.18–0.42) |
Men (219) | 0.29 | 0.22 (0.12–0.32) | 0.34 | 0.30 (0.17–0.42) | 0.36 | 0.36 (0.19–0.54) |
Age group | ||||||
 66 years (361) | 0.29 | 0.25 (0.14–0.36) | 0.35 | 0.32 (0.20–0.44) | 0.31 | 0.29 (0.12–0.46) |
 81–87 years (229) | 0.24 | 0.14 (0.07–0.21) | 0.25 | 0.17 (0.08–0.25) | 0.32 | 0.30 (0.16–0.44) |
  ≥ 90 years (29) | 0.26# | 0.12 (−0.01–0.25) | 0.22# | 0.10 (−0.01–0.21) | 0.27# | 0.20 (−0.04–0.45) |
Education | ||||||
  ≤ High school (268) | 0.28 | 0.22 (0.13–0.30) | 0.25 | 0.19 (0.10–0.27) | 0.38 | 0.37 (0.23–0.51) |
 University (351) | 0.25 | 0.19 (0.10–0.27) | 0.35 | 0.29 (0.18–0.40) | 0.23 | 0.23 (0.08–0.38) |
Marital status | ||||||
 Living alone (275) | 0.32 | 0.25 (0.15–0.34) | 0.30 | 0.23 (0.14–0.32) | 0.31 | 0.30 (0.17–0.44) |
 Married/partner (344) | 0.23 | 0.17 (0.08–0.25) | 0.31 | 0.25 (0.15–0.35) | 0.31 | 0.32 (0.16–0.47) |
Body mass index | ||||||
 Underweight < 20 (22) | 0.42# | 0.40 (−0.07–0.87) | 0.53 | 0.43 (0.07–0.79) | 0.23# | 0.23 (−0.31–0.76) |
 Normal 20–24 (278) | 0.25 | 0.19 (0.09–0.30) | 0.24 | 0.20 (0.08–0.31) | 0.39 | 0.38 (0.21–0.56) |
 Overweight 25–29 (233) | 0.23 | 0.16 (0.07–0.26) | 0.30 | 0.23 (0.12–0.34) | 0.29 | 0.28 (0.12–0.44) |
 Obese ≥30 (85) | 0.32 | 0.21 (0.09–0.33) | 0.33 | 0.25 (0.10–0.39) | 0.24 | 0.24 (0.01–0.47) |
Physical function | ||||||
 5 STS, not able to (59) | 0.23# | 0.14 (0.01–0.26) | 0.20# | 0.13 (−0.02–0.28) | 0.39 | 0.35 (0.14–0.57) |
 5 STS, able to (555) | 0.27 | 0.20 (0.13–0.27) | 0.31 | 0.25 (0.17–0.32) | 0.28 | 0.28 (0.16–0.39) |