Table 3.

Bland–Altman analyses for self-reported and measured height, weight and BMI

Variables	Bland–Altman		p value*
	Absolute mean differences (LOA)	Relative mean differences (LOA, %)
All (n = 140)
Height (cm)	0.19 (−2.3 to 2.7)	0.11 (−1.4 to 1.6)	0.066
Weight (kg)	−0.70 (−3.6 to 2.1)	−0.93 (−4.9 to 3.1)	<0.0001
BMI (kg m−2)	−0.29 (−1.5 to 1.0)	−1.14 (−6.2 to 4.0)	<0.0001
By sex
Women (n = 79)
Height (cm)	0.03 (−2.8 to 2.7)	0.02 (−1.7 to 1.7)	0.084
Weight (kg)	−0.65 (−3.7 to 2.4)	−0.94 (−5.6 to 3.7)	0.0004
BMI (kg m−2)	−0.23 (−1.6 to 1.2)	−0.89 (−6.7 to 4.9)	0.005
Men (n = 61)
Height (cm)	0.49 (−1.4 to 2.4)	0.28 (−0.8 to 1.4)	0.0002
Weight (kg)	−0.81 (−3.3 to 1.8)	−0.90 (−3.9 to 2.1)	<0.0001
BMI (kg m−2)	−0.38 (−1.4 to 0.6)	−1.45 (−5.3 to 2.4)	<0.0001
By age group
<45 years (n = 71)
Height (cm)	0.21 (−2.1 to 2.5)	0.11 (−1.3 to 1.5)	0.136
Weight (kg)	−0.50 (−3.6 to 2.6)	−0.69 (−5.3 to 3.9)	0.009
BMI (kg m−2)	−0.23 (−1.5 to 1.1)	−0.91 (−6.6 to 4.8)	0.005
>45 years (n = 69)
Height (cm)	0.18 (−2.1 to 2.5)	0.10 (−1.5 to 1.7)	0.236
Weight (kg)	−0.91 (−3.5 to 1.6)	−1.16 (−4.4 to 2.0)	<0.0001
BMI (kg m−2)	−0.37 (−1.5 to 0.8)	−1.37 (−5.7 to 3.0)	<0.0001
By BMI categories
Normal weight (n = 80)
Height (cm)	0.04 (−2.1 to 2.2)	0.02 (−1.3 to 1.3)	0.719
Weight (kg)	−0.32 (−3.1 to 2.5)	−0.52 (−5.0 to 4.0)	0.053
BMI (kg m−2)	−0.12 (−1.3 to 1.0)	−0.56 (−5.9 to 4.7)	0.071
Overweight (n = 43)
Height (cm)	0.56 (−2.4 to 3.5)	0.32 (−1.5 to 2.1)	0.017
Weight (kg)	−1.08 (−3.2 to 1.0)	−1.37 (−3.9 to 1.2)	<0.0001
BMI (kg m−2)	−0.54 (−1.7 to 0.7)	−2.01 (−6.4 to 2.4)	<0.0001
Obese (n = 17)
Height (cm)	0.01 (−2.4 to 3.2)	0.01 (−1.4 to 1.4)	0.984
Weight (kg)	−1.56 (−3.8 to 1.4)	−1.70 (−5.6 to 2.2)	0.002
BMI (kg m−2)	−0.53 (−1.8 to 0.7)	−1.68 (−6.1 to 2.8)	0.006

Data represent absolute and relative mean differences (SR—measured values) with their corresponding limits of agreements (LOA ± 1.96 SD)

* Paired t test was used for assessing absolute differences between means of SR and measured values