Table 4.
Univariate Sibling Models.
| Parameter Estimates | Model Fit Statistics | ||||||
|---|---|---|---|---|---|---|---|
| MEBS Scale | A | C | E | −2lnL (df) | −2lnLΔ (df) | p | AIC |
| Full Sample (n = 51 Biological Pairs; n = 101 Adoptive Pairs) | |||||||
| Total Score | |||||||
| ACE | .82 (.21–1.00) |
.02 (.00–.20) |
.17 (.00–.69) |
925.09 (327) |
-- | -- | 271.09 |
| AE |
.85 (.35–1.00) |
-- |
.15 (.00–.65) |
925.12 (328) |
.03 (1) |
.86 | 269.12 |
| CE | -- | .14 (.00–.29) |
.86 (.71–1.00) |
931.81 (328) |
6.72 (1) |
.009 | 275.81 |
| E | -- | -- | 1.00 (−1.00–1.00) |
935.21 (329) |
10.12 (2) |
.006 | 277.21 |
|
Weight Preoccupation |
|||||||
| ACE | .47 (.00–1.00) |
.07 (.00–.25) |
.46 (.00–.97) |
930.23 (327) |
-- | -- | 276.23 |
| AE |
.61 (.05–1.00) |
-- |
.39 (.00–.95) |
930.73 (328) |
.50 (1) |
.48 | 274.73 |
| CE | -- | .14 (.00–.29) |
.86 (.71–1.00) |
932.19 (328) |
1.96 (1) |
.16 | 276.19 |
| E | -- | -- | 1.00 (−1.00–1.00) |
935.24 (329) |
5.01 (2) |
.08 | 277.24 |
|
Body Dissatisfaction |
|||||||
| ACE | .59 (.03–1.00) |
.00 (.00–.14) |
.41 (.00–.94) |
930.58 (327) |
-- | -- | 276.58 |
| AE |
.59 (.06–1.00) |
-- |
.41 (.00–.94) |
930.58 (328) |
.00 (1) |
1.00 | 274.58 |
| CE | -- | .06 (.00–.21) |
.94 (.79–1.00) |
934.78 (328) |
4.20 (1) |
.04 | 278.78 |
| E | -- | -- | 1.00 (−1.00–1.00) |
935.33 (329) |
4.75 (2) |
.09 | 277.33 |
| Binge Eating | |||||||
| ACE | .61 (.05–1.00) |
.00 (.00–.15) |
.39 (.00–.91) |
930.07 (327) |
-- | -- | 276.07 |
| AE |
.61 (.09–1.00) |
-- |
.39 (.00–.91) |
930.07 (328) |
.00 (1) |
1.00 | 274.07 |
| CE | -- | .07 (.00–.22) |
.93 (.78–1.00) |
934.51 (328) |
4.44 (1) |
.04 | 278.51 |
| E | -- | -- | 1.00 (−1.00–1.00) |
935.25 (329) |
5.18 (2) |
.08 | 277.25 |
| Same Ethnicity Only (n = 51 Biological Pairs; n = 66 Adoptive Pairs) | |||||||
| Total Score | |||||||
| ACE | .95 (35–1.00) |
.00 (.00–.19) |
.05 (.00–.58) |
699.01 (241) |
-- | -- | 217.01 |
| AE |
.95 (.44–1.00) |
-- |
.05 (.00–.56) |
699.01 (242) |
.00 (1) |
1.00 | 215.01 |
| CE | -- | .15 (.00–.32) |
.85 (.68–1.00) |
707.45 (242) |
8.44 (1) |
.004 | 223.45 |
| E | -- | -- | 1.00 (−1.00–1.00) |
710.26 (243) |
11.25 (2) |
.004 | 224.26 |
|
Weight Preoccupation |
|||||||
| ACE | .68 (.02–1.00) |
.00 (.00–.20) |
.32 (.00–.91) |
694.11 (241) |
-- | -- | 212.11 |
| AE |
.68 (.11–1.00) |
-- |
.32 (.00–.89) |
694.11 (242) |
.00 (1) |
1.00 | 210.11 |
| CE | -- | .11 (.00–.28) |
.89 (.72–1.00) |
698.12 (242) |
4.01 (1) |
.045 | 214.12 |
| E | -- | -- | 1.00 (−1.00–1.00) |
699.46 (243) |
5.35 (2) |
.07 | 213.46 |
|
Body Dissatisfaction |
|||||||
| ACE | .68 (.05–1.00) |
.00 (.00–.19) |
.32 (.00–.88) |
694.03 (241) |
-- | -- | 212.03 |
| AE |
.68 (.14–1.00) |
-- |
.32 (.00–.86) |
694.03 (242) |
.00 (1) |
1.00 | 210.03 |
| CE | -- | .11 (.00–.28) |
.89 (.72–1.00) |
698.43 (242) |
4.40 (1) |
.04 | 214.43 |
| E | -- | -- | 1.00 (−1.00–1.00) |
699.85 (243) |
5.82 (2) |
.054 | 213.85 |
| Binge Eating | |||||||
| ACE | .64 (.04–1.00) |
.00 (.00–.17) |
.36 (.00–.91) |
687.55 (241) |
-- | -- | 205.55 |
| AE |
.64 (.09–1.00) |
-- |
.36 (.00–.91) |
687.55 (242) |
.00 (1) |
1.00 | 203.55 |
| CE | -- | .09 (.00–.26) |
.91 (.74–1.00) |
691.79 (242) |
4.24 (1) |
.04 | 207.79 |
| E | -- | -- | 1.00 (−1.00–1.00) |
692.66 (243) |
5.11 (2) |
.08 | 206.66 |
| Caucasian Pairs Only (n = 47 Biological Pairs; n = 17 Adoptive Pairs) | |||||||
| Total Score | |||||||
| ACE | .93 (.20–1.00) |
.00 (.00–.31) |
.07 (.00–.62) |
373.47 (130) |
-- | -- | 113.47 |
| AE |
.93 (.42–1.00) |
-- |
.07 (.00–.58) |
373.47 (131) |
.00 (1) |
1.00 | 111.47 |
| CE | -- | .28 (.05–.49) |
.72 (.51–.95) |
379.22 (131) |
5.75 (1) |
.02 | 117.22 |
| E | -- | -- | 1.00 (−1.00–1.00) |
384.72 (132) |
11.25 (2) |
.004 | 120.72 |
|
Weight Preoccupation |
|||||||
| ACE | .65 (.00–1.00) |
.00 (.00–.35) |
.35 (.00–.93) |
370.48 (130) |
-- | -- | 110.48 |
| AE |
.65 (.10–1.00) |
-- |
.35 (.00–.90) |
370.48 (131) |
.00 (1) |
1.00 | 108.48 |
| CE | -- | .21 (.00–.44) |
.79 (.56–1.00) |
372.96 (131) |
2.48 (1) |
.12 | 110.96 |
| E | -- | -- | 1.00 (−1.00–1.00) |
375.81 (132) |
5.33 (2) |
.07 | 111.81 |
|
Body Dissatisfaction |
|||||||
| ACE | .68 (.00–1.00) |
.00 (.00–.30) |
.32 (.00–.90) |
376.54 (130) |
-- | -- | 116.54 |
| AE |
.68 (.14–1.00) |
-- |
.32 (.00–.86) |
376.54 (131) |
.00 (1) |
1.00 | 114.54 |
| CE | -- | .20 (.00–.42) |
.80 (.58–1.00) |
379.69 (131) |
3.15 (1) |
.08 | 117.69 |
| E | -- | -- | 1.00 (−1.00–1.00) |
382.38 (132) |
5.84 (2) |
.054 | 118.38 |
| Binge Eating | |||||||
| ACE | .62 (.00–1.00) |
.00 (.00–.36) |
.38 (.00–.95) |
366.70 (130) |
-- | -- | 106.70 |
| AE |
.62 (.09–1.00) |
-- |
.38 (.00–.91) |
366.70 (131) |
.00 (1) |
1.00 | 104.70 |
| CE | -- | .21 (.00–.42) |
.79 (.58–1.00) |
368.78 (131) |
2.08 (1) |
.15 | 106.78 |
| E | -- | -- | 1.00 (−1.00–1.00) |
371.80 (132) |
5.10 (2) |
.08 | 107.80 |
Note. MEBS = Minnesota Eating Behavior Survey; A = additive genetic effects; C = shared environmental effects; E = nonshared environmental effect; −2lnL = −2 times the log likelihood; −2lnLΔ = the difference in −2lnL values between the full (i.e., ACE) and reduced model; AIC = Akaike’s Information Criteria; Same Ethnicity = pairs who “match” on ethnicity (i.e., are either Caucasian-Caucasian or Asian-Asian pairs). The 95% confidence intervals for parameter estimates are included in parentheses. The best-fitting models are noted in bolded text.