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Table 4 Comparisons between measured weight at baseline and participant recall of baseline weight at 12 months follow up

From: Self-reported and measured weights and heights among adults in Seattle and King County

  Baseline measured weight (kg) Recalled reported weight (kg)     
  Mean (SD) Mean (SD) Differencea 95 % CI P-valueb P for trendc
Overall 81.17 (21.54) 80.26 (21.84) 0.90 (0.51,1.30) <0.001  
Age       
 21–49 80.41 (21.62) 79.46 (21.62) 0.95 (0.46,1.43) <0.001  
  ≥ 50 82.32 (21.45) 81.48 (22.20) 0.84 (0.16,1.52) 0.016 0.804
Gender       
 Men 90.67 (21.32) 90.04 (22.11) 0.64 (−0.37,1.64) 0.212  
 Women 76.74 (20.21) 75.72 (20.20) 1.03 (0.68,1.38) <0.001 0.470
Race/Ethnicity       
 White 81.54 (21.74) 80.64 (21.12) 0.91 (0.49,1.33) <0.001  
 Non-white 79.11 (20.46) 78.22 (20.33) 0.89 (−0.27,2.04) 0.130 0.976
Highest education       
  ≤ Some college 86.35 (24.70) 85.36 (24.49) 0.99 (0.25,1.74) 0.010  
 College graduates 78.27 (19.01) 77.42 (19.70) 0.86 (0.39,1.32) <0.001 0.761
Annual household income       
  < $50,000 86.87 (24.53) 85.93 (24.20) 0.94 (0.06,1.83) 0.038  
 $50,000–< $100,000 81.70 (20.46) 80.91 (21.53) 0.78 (0.02,1.54) 0.043  
  ≥ $100,000 76.18 (18.97) 75.18 (19.03) 1.00 (0.58,1.42) <0.001 0.876
BMI       
 Underweight or normal 63.36 (8.51) 62.56 (8.61) 0.80 (0.36,1.24) <0.001  
 Overweight 80.21 (10.82) 79.21 (12.49) 1.00 (0.08,1.93) 0.034  
 Obese 102.01 (20.00) 101.07 (20.25) 0.94 (0.18,1.69) 0.015 0.745
  1. aDifference = Difference between measured weight at baseline and recalled weight
  2. b P-value = from paired t-test of mean difference (measured-recalled)
  3. c P-value = from linear regression comparing mean difference across a category