Table 4.

Model fitting results for the best-fitting model

	A1	C1	E1	A2	C2	E2	A3	C3	E3	A4	C4	E4	A5	C5	E5
Marital conflict	0.49 (0.43, 0.54)	0.83 (0.80, 0.86)	0.26 (0.22, 0.30)
Parental monitoring	0 —	0.05a (0, 0.12)	0 —	0.1 (0.02, 0.18)	0.71 (0.67, 0.75)	0.7 (0.66, 0.74)
Sibling negativity	0.11 (0.06, 0.16)	0.2 (0.12, 0.28)	0 —	0 —	0 —	0 —	0.27 (0.12, 0.35)	0.88 (0.85, 0.90)	0.33 (0.29, 0.38)
Peer group delinquency	0.26 (0.19, 0.33)	0 —	0 —	0.74 (0.68, 0.79)	0.27 (0.18, 0.36)	0 —	0 —	0 —	0 —	0 —	0.51 (0.42, 0.58)	0.25 (0.22, 0.29)
Drug Use	0.21 (0.07, 0.35)	0 —	0 —	0.21 (0.10, 0.32)	0.17 (0.04, 0.27)	0 —	0 —	0.11 (0.01, 0.20)	0 —	0 —	0 —	0 —	0 —	0.71 (0.62, 0.77)	0.62 (0.55, 0.69)

Note: Unstandardized beta weights are presented (95% confidence intervals). Parameter estimates of 0 indicate that the parameter was not included in the best-fitting model. The latent factors A1, C1, and E1 refer to the respective genetic, shared, and nonshared environmental influences on marital conflict. A2, C2, and E2 refer to the respective unique genetic, shared, and nonshared environmental influences on parental monitoring or the genetic, shared, and nonshared environmental influences on parental monitoring that are not shared with marital conflict. A3, C3, and E3 refer to the respective unique genetic, shared, and nonshared environmental influences on sibling negativity not in common with either marital conflict or parental monitoring. A4, C4, and E4 refer to the respective unique genetic, shared, and nonshared environmental influences on peer group delinquency not shared with any of the previous constructs; and A5, C5, and E5 represent the respective unique genetic, shared, and nonshared environmental influences on number of drugs initiated by young adulthood not in common with any of the predictors.

^aA parameter estimate is not significantly different from zero but is required to be in the model (or the model fails).