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Table 3 Comparisons between measured and self-reported weight at 12 months follow up

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

 

12-month follow up measured weight (kg)

12-month follow up reported weight (kg)

    
 

Mean (SD)

Mean (SD)

Differencea

95 % CI

P-valueb

P for trendc

Overall

80.61(21.56)

79.64(21.40)

0.97

(0.74,1.21)

<0.001

 

Age

      

 21–49

80.06(21.45)

79.25(21.42)

0.81

(0.48,1.15)

<0.001

 

  ≥ 50

81.45(21.76)

80.23(21.43)

1.22

(0.91,1.53)

<0.001

0.077

Gender

      

 Men

90.37 (21.19)

89.52 (21.43)

0.85

(0.37,1.33)

<0.001

 

 Women

76.07 (20.22)

75.04 (19.81)

1.03

(0.77,1.30)

<0.001

0.507

Race/Ethnicity

      

 White

81.03 (21.66)

80.00 (21.62)

1.04

(0.81,1.26)

<0.001

 

 Non-white

78.33 (21.00)

77.68 (20.22)

0.64

(−0.29,1.57)

0.172

0.411

Highest education

      

  ≤ Some college

85.43 (24.41)

84.31 (24.41)

1.12

(0.64,1.61)

<0.001

 

 College graduates

77.92 (19.32)

77.03 (19.08)

0.89

(0.64,1.14)

<0.001

0.410

Annual household income

      

  < $50,000

86.01 (23.99)

84.94 (23.85)

1.08

(0.50,1.65)

<0.001

 

 $50,000–< $100,000

80.94 (21.00)

79.86 (20.87)

1.08

(0.72,1.44)

<0.001

 

  ≥ $100,000

76.07 (19.12)

75.28 (18.99)

0.79

(0.46,1.11)

<0.001

0.355

BMI

      

 Underweight or normal

63.49 (8.61)

63.01 (8.49)

0.48

(0.20,0.76)

<0.001

 

 Overweight

80.20 (10.00)

79.05 (10.25)

1.15

(0.68,1.62)

<0.001

 

 Obese

103.93 (20.08)

102.46 (20.58)

1.47

(0.96,1.97)

<0.001

0.001

  1. aDifference = Difference between measured and self-reported weight
  2. b P-value = from paired t-test of mean difference (measured-self reported)
  3. c P-value = from linear regression comparing mean difference across a category, p-values <0.05 are in bold