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Table 2 Spearman correlation (rho) between questionnaire-assessed and accelerometer- assessed sedentary time, walking and MVPA according to adiposity group and sociodemographic characteristics

From: Using open source accelerometer analysis to assess physical activity and sedentary behaviour in overweight and obese adults

   Sedentary Walking MVPA
   rho 95% CI rho 95% CI rho 95% CI
All participants   0.49 0.45, 0.53 0.58 0.54, 061. 0.56 0.53, 0.58
Adiposity group
 BMI category
  Normal weight ≤ 24.9 n = 37 0.36 0.30, 0.43 0.46 0.40, 0.49 0.43 0.35, 0.49
  Overweight 25–29.9 n = 37 0.33 0.31, 0.36 0.33 0.29, 0.38 0.30 0.26, 0.35
  Obese ≥30 n = 43 0.24 0.20, 0.30 0.34 0.26, 0.42 0.28 0.22, 0.36
 BIA body fat %
  Average 14–20 n = 43 0.30 0.26, 0.34 0.31 0.27, 0.39 0.33 0.25, 0.39
  High 21–25 n = 33 0.28 0.24, 0.31 0.32 0.28, 0.37 0.21 0.17, 0.26
  Obese > 25 n = 41 0.22 0.18, 0.25 0.25 0.19, 0.32 0.14 0.08, 0.22
 Waist-to-hip ratio
  Normal < 0.90 n = 43 0.38 0.33, 0.40 0.58 0.42, 0.64 0.46 0.38, 0.52
  Overweight 0.90–0.99 n = 32 0.34 0.32, 0.37 0.48 0.44, 0.53 0.35 0.31, 0.40
  Obesity > 1.00 n = 42 0.23 0.18, 0.25 0.33 0.25, 0.41 0.24 0.18, 0.32
Sociodemographic Measures
 Smoking status
  Yes n = 19 0.26 0.21, 0.29 0.30 0.24, 0.36 0.28 0.20, 0.34
  No n = 98 0.31 0.29, 0.33 0.34 0.28, 0.39 0.26 0.22, 0.31
 Alcohol
  Less than once per week n = 62       
  1 or 2 times a week or less n = 44 0.29 0.23, 0.32 0.31 0.27, 0.35 0.30 0.26, 0.36
  Several times a week or daily n = 11 0.30 0.29, 0.33 0.32 0.29, 0.35 0.26 0.22, 0.31
  GCSE/O level n = 43 N/A   N/A   N/A  
  A level n = 32 N/A   N/A   N/A  
  University degree n = 43 0.32 0.30, 0.34 0.31 0.27, 0.35 0.32 0.24, 0.38
  Postgraduate n = 32 0.21 0.19, 0.24 0.36 0.33, 0.35 0.34 0.30, 0.39
  1. Abbreviations: CI, confidence interval