Table 3.

Parameter estimates for the Extended-Twin Family (ETFMM) Model with Age moderation for BMI Fluctuation

Means	Estimate-Male (95% Confidence Interval)	Estimate-Female (95% Confidence Interval)
Parents of twins	3.4 (3.1–3.7)	4.6 (4.3–4.9)
Twins, Spouses, Siblings	3.1 (2.9–3.3)	3.5 (3.2–3.7)
Children of twins	3.2 (3.0–3.4)	4.0 (3.7–4.2)

Variance Components	Estimate-Male (95% Confidence Interval)	Estimate-Female (95% Confidence Interval)
Additive genetic	0.31 (0.02–0.43)	0.15 (0.01–0.38)
Dominant genetic	0.01 (0.00–0.22)	0.29 (0.10–0.41)
Sex-specific genetic	0.02 (0.00–0.28)	Not Applicable
Assortative mating	0.01 (0.00–0.02)	0.01 (0.00–0.02)
Sibling environment	0.00 (0.00–0.08)	0.02 (0.00–0.08)
Twin environment	0.22 (0.13–0.32)	0.15 (0.09–0.22)
Unique environment	0.43 (0.38–0.48)	0.37 (0.34–0.40)
Cultural transmission	0.01 (0.00–0.02)	0.02 (0.00–0.06)