Table 4

Parent-child concordance in body composition characteristics

	Parent-child			Mother-child			Father-child
	n	CC	95% CI	n	CC	95% CI	n	CC	95% CI
Pearson’s correlation (unadjusted)
Height	1830	0.30	0.25 to 0.34	1605	0.36	0.32 to 0.40	225	0.30	0.18 to 0.42
Weight	1830	0.27	0.23 to 0.32	1605	0.29	0.24 to 0.33	225	0.28	0.16 to 0.40
BMI/BMI z-score*	1830	0.27	0.23 to 0.32	1605	0.28	0.23 to 0.32	225	0.27	0.14 to 0.38
Waist circumference/z-score†	1814	0.23	0.19 to 0.28	1592	0.24	0.19 to 0.29	222	0.31	0.18 to 0.42
Waist-to-height ratio	1814	0.28	0.24 to 0.32	1592	0.28	0.23 to 0.32	222	0.34	0.22 to 0.45
Total body fat percentage	1810	0.28	0.24 to 0.32	1587	0.28	0.25 to 0.32	223	0.36	0.24 to 0.47
Total body fat-free mass percentage	1810	0.29	0.25 to 0.33	1587	0.29	0.25 to 0.34	223	0.35	0.23 to 0.46
Truncal fat percentage	1430	0.27	0.22 to 0.33	1244	0.26	0.20 to 0.31	186	0.37	0.24 to 0.49
Non-truncal fat percentage	1430	0.28	0.23 to 0.33	1244	0.28	0.22 to 0.33	186	0.32	0.18 to 0.44
Partial correlation (adjusted for covariates)‡
Height	1825	0.37	0.33 to 0.42	1603	0.38	0.34 to 0.42	222	0.36	0.23 to 0.48
Weight	1825	0.28	0.23 to 0.32	1603	0.28	0.22 to 0.33	222	0.30	0.14 to 0.47
BMI/BMI z-score*	1825	0.27	0.23 to 0.31	1603	0.27	0.22 to 0.32	222	0.28	0.11 to 0.45
Waist circumference/z-score†	1809	0.25	0.20 to 0.29	1590	0.24	0.19 to 0.29	219	0.31	0.18 to 0.45
Waist-to-height ratio	1809	0.28	0.24 to 0.33	1590	0.28	0.22 to 0.33	219	0.36	0.23 to 0.50
Total body fat percentage	1805	0.29	0.25 to 0.34	1585	0.28	0.23 to 0.32	220	0.36	0.24 to 0.48
Total body fat-free mass percentage	1805	0.30	0.25 to 0.34	1585	0.29	0.25 to 0.34	220	0.35	0.24 to 0.47
Truncal fat percentage	1426	0.26	0.21 to 0.31	1242	0.25	0.20 to 0.30	184	0.36	0.22 to 0.50
Non-truncal fat percentage	1426	0.27	0.24 to 0.34	1242	0.26	0.23 to 0.34	184	0.30	0.17 to 0.45

Sample weights not applied to data. Reduced sample size for total and truncal fat mass due to two-limb BIA scales used at home visits not generating these data. Sample restricted to children and parents whose relationship was biological child/parent (n=20 child-parent pairs with body composition data available were excluded).
*UK90 BMI z-score for children and raw BMI for parents.
†UK90 waist circumference z-score for children and raw waist circumference for parents.
‡Adjusted for child and parent age, and disadvantage index. The ’all biological child-parent pairs' model additionally adjusted for child and parent sex.
BIA, bioimpedence analysis; BMI, body mass index; CC, correlation coefficient; UK90, United Kingdom 1990.