Change and Stability in Sibling Resemblance in Obesity Markers: The Portuguese Sibling Study on Growth, Fitness, Lifestyle, and Health

Table 3

Intraclass correlation coefficients (ρ) and 95% CI within sib-ships for the obesity markers with twins and with twins data.

Tracking coefficients		%BF	WC	BMI
Brother-brother	Baseline	0.45 (0.19–0.75)	0.37 (0.12–0.72)	0.24 (0.04–0.71)
	Follow-up	0.39 (0.13–0.73)	0.36 (0.11–0.72)	0.23 (0.03–0.72)
Sister-sister	Baseline	0.55 (0.21–0.84)	0.53 (0.21–0.83)	0.62 (0.31–0.86)
	Follow-up	0.59 (0.27–0.85)	0.47 (0.15–0.81)	0.63 (0.31–0.86)
Brother-sister	Baseline	0.03 (0.00–1.00)	0.01 (0.00–1.00)	0.07 (0.00–0.88)
	Follow-up	0	0	0.19 (0.03–0.62)