Table 2.
A. Baseline and follow-up combined, DZ and MZ combined, n=1534, R2=0.98 | ||||
---|---|---|---|---|
Parameter | Estimate (SE) | F | DF denominator | P |
Intercept | 7.752 (0.0466) | |||
Age | −0.0186 (0.0005) | 1309.10 | 787.3 | <0.0001 |
Sex | −0.1643 (0.0615) | 7.14 | 402.0 | 0.008 |
Opposite sex (OS) | −0.2378 (0.0818) | 8.46 | 492.9 | 0.004 |
Sex * OS | 0.1952 (0.0808) | 5.84 | 775.3 | 0.016 |
B. Baseline and follow-up combined, DZ twins only, n=845, R2=0.98 | ||||
---|---|---|---|---|
Parameter | Estimate (SE) | F | DF denominator | P |
Intercept | 7.685 (0.0651) | |||
Age | −0.0175 (0.0007) | 608.12 | 433.4 | <0.0001 |
Sex | −0.1911 (0.0876) | 3.58 | 276.0 | <0.06 |
Opposite sex (OS) | −0.2229 (0.0909) | 2.57 | 222.5 | 0.11 |
Sex * OS | 0.2230 (0.1082) | 4.25 | 402.1 | 0.04 |
C. Baseline, DZ twins only, n=433, R2=0.76 | ||||
---|---|---|---|---|
Parameter | Estimate (SE) | F | DF denominator | P |
Intercept | 7.800 (0.156) | |||
Age | −0.0203 (0.0038) | 28.09 | 219.8 | <0.0001 |
Sex | −0.1649 (0.0916) | 3.24 | 221.4 | 0.073 |
Opposite sex (OS) | −0.2489 (0.0956) | 6.78 | 283.9 | <0.01 |
Sex * OS | 0.1993 (0.1147) | 3.02 | 401.7 | 0.083 |
D. Follow-up, DZ twins only, n=412, R2=0.81 | ||||
---|---|---|---|---|
Parameter | Estimate (SE) | F | DF denominator | P |
Intercept | 7.792 (0.1998) | |||
Age | −0.0198 (0.0038) | 27.19 | 219.6 | <0.0001 |
Sex | −0.1913 (0.0889) | 4.63 | 221.6 | 0.033 |
Opposite sex (OS) | −0.1864 (0.0917) | 4.14 | 267.6 | 0.043 |
Sex * OS | 0.2106 (0.1082) | 3.79 | 375.7 | 0.052 |
Sex was coded 0 (females) and 1 (males). Opposite sex was also coded 0 (same sex) and 1 (opposite sex). Twin identity was included as random effect in all tables, with individual identity nested in twin identity added as random effect in tables A and B.
Note the similarity of the Sex * OS estimate in all data selections. Numerator DF=1 in all cases.