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Table 4 Concurrent validity for self-reported physical activity and accelerometer derived physical activity

From: Device-measured sedentary behavior and physical activity in older adults differ by demographic and health-related factors

Characteristics (n)≥ 150 min/week MVPA steppinga≥ 7000 steps/day≥ 5000 steps/day
 Spearman’s rhoKappa (95% CI)Spearman’s rhoKappa (95% CI)Spearman’s rhoKappa (95% CI)
All (619)0.280.21 (0.15–0.28)0.310.25 (0.18–0.32)0.320.32 (0.22–0.42)
Women (400)0.270.20 (0.13–0.28)0.300.23 (0.15–0.31)0.310.30 (0.18–0.42)
Men (219)0.290.22 (0.12–0.32)0.340.30 (0.17–0.42)0.360.36 (0.19–0.54)
Age group
 66 years (361)0.290.25 (0.14–0.36)0.350.32 (0.20–0.44)0.310.29 (0.12–0.46)
 81–87 years (229)0.240.14 (0.07–0.21)0.250.17 (0.08–0.25)0.320.30 (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)0.280.22 (0.13–0.30)0.250.19 (0.10–0.27)0.380.37 (0.23–0.51)
 University (351)0.250.19 (0.10–0.27)0.350.29 (0.18–0.40)0.230.23 (0.08–0.38)
Marital status
 Living alone (275)0.320.25 (0.15–0.34)0.300.23 (0.14–0.32)0.310.30 (0.17–0.44)
 Married/partner (344)0.230.17 (0.08–0.25)0.310.25 (0.15–0.35)0.310.32 (0.16–0.47)
Body mass index
 Underweight < 20 (22)0.42#0.40 (−0.07–0.87)0.530.43 (0.07–0.79)0.23#0.23 (−0.31–0.76)
 Normal 20–24 (278)0.250.19 (0.09–0.30)0.240.20 (0.08–0.31)0.390.38 (0.21–0.56)
 Overweight 25–29 (233)0.230.16 (0.07–0.26)0.300.23 (0.12–0.34)0.290.28 (0.12–0.44)
 Obese ≥30 (85)0.320.21 (0.09–0.33)0.330.25 (0.10–0.39)0.240.24 (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)0.390.35 (0.14–0.57)
 5 STS, able to (555)0.270.20 (0.13–0.27)0.310.25 (0.17–0.32)0.280.28 (0.16–0.39)
  1. aMVPA stepping: ≥100 steps/min. #Non-significant. CI = confidence interval; MVPA = moderate-to-vigorous physical activity; 5 STS = 5 times sit to stand test
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