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Table 3 Genetic and environmental components of variance for BMI (N = 12242)a

From: The association of cigarette smoking and alcohol drinking with body mass index: a cross-sectional, population-based study among Chinese adult male twins

 

Proportion of variance (95 % CI)

Fit of modelb

 

A

C

E

−2LL

AIC

p

ACE model

0.58 (0.52 0.64)

0.26 (0.20 0.31)

0.16 (0.16 0.17)

54846.73

30374.73

---

AE model

0.74 (0.73 0.75)

---

0.26 (0.25 0.27)

55617.62

31143.62

< 0.001

  1. Abbreviations: −2LL −2 log likelihood, A additive genetic component, C common environment component, E unique environment component, CI confidence interval
  2. aAdjusted for age and region in the model
  3. bModel fitting comparison when shared environment component C is removed