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Table 1 Mean difference and intraclass correlation for weight, height and BMI for informed and uninformed group

From: Agreement between self-reported and measured weight and height collected in general practice patients: a prospective study

Group Informed (n = 172)* Uninformed (n = 160)**
Sex n (%)   
Male 78 (45) 69 (43)
Female 94 (55) 91 (57)
Age n (%)   
18-39 60 (35) 48 (30)
40-64 67 (39) 74 (46)
65 + 45 (26) 38 (24)
Number with concession health care (%) 71 (42) 66 (42)
Mean difference a (sd) [95% CI]   
Weight −1.0 (4.5) [−9.8, 7.8] −1.4 (3.5) [−8.1,5.4]
Height 0.7 (3.9) [−6.9, 8.2] 1.0 (5.0) [−8.7, 10]
BMI −0.6 (2.2) [−4.8, 3.7] −0.7 (1.9) [−4.4,3.0]
ICC [95% CI]   
Weight 0.97 [0.96, 0.98] 0.98 [0.97, 0.99]
Height 0.92 [0.90, 0.94] 0.90 [0.87, 0.93]
BMI 0.93 [0.91, 0.95] 0.94 [0.93, 0.96]
  1. ICC: Intraclass correlation; CI: confidence interval; BMI: Body Mass Index; sd: standard deviation.
  2. a mean difference calculated using self-reported weight minus measured weight.
  3. *Missing data for informed group: 3 missing for weight, 3 missing for height; subsequently 6 missing for BMI.
  4. **Missing data for uninformed group: 2 missing for weight, 6 missing for height; subsequently 6 missing for BMI.