Table 1.

Multivariate analysis of cannabis availability, cannabis initiation, and the number of DSM-IV symptoms of abuse.

Symptoms of DSM-IV abuse
Model	−2LL	df	Δ−2LL	Δdf	P	BIC
1	7384.69	4049				−3922.20
2	7385.77	4052	1.08	3	0.78	−3927.31
3	7464.12	4055	79.43	6	0.00	−3893.78
4	7474.64	4055	89.95	6	0.00	−3888.51

Model 1 = See Figure 2

Model 2 = See Figure 2 in which a_3,1, c_3,1 & e_3,1 = 0

Model 3 = See Figure 3

Model 4 = See Figure 3 in which β₃ = 0

Δ−2LL = change in −2 × log likelihood (asymptotically distributed as a chi-square) with degrees of freedom equal to the difference in degrees of freedom between saturated (Model 1) & nested sub models below.

BIC = sample size adjusted Bayesian Information Criterion (larger negative values imply better fit)