Model | Main effects | Interaction effects | df | D4-151 | Number (95% CI)4-152 |
(1) | All sources (u1+u2+u3+u4) | — | 55 | 215.84-150 | 1492 (1901, 2560) |
(2) | All sources and gender (u1+u2+u3+u4+ug) | — | 54 | 76.24-150 | 1492 (1147, 2414) |
(3) | All sources and age (u1+u2+u3+u4+ua) | — | 54 | 214.54-150 | 1492 (1927, 2502) |
(4) | All sources (u1+u2+u3+u4+ua2+ua3) | F2 and age, F3 and age | 53 | 203.54-150 | 1499 (1998, 2536) |
(5) | All sources, gender and age (u1+u2+u3+u4+u23+ u34+ ug+ ua+ua2+ua3) | F2 and F3, F3 and F4, F2 and age, F3 and age | 49 | 32.74-150 | 2523 (1623, 4627) |
↵4-151 Degrees of freedom of the model and corresponding residual deviance.
↵4-152 Number of subjects with alcohol related problems estimated according to the parameters of the log-linear model and corresponding 95% confidence intervals.
↵4-150 p<0.05; the tested null hypothesis is that the model fits the data; alternative hypothesis is a significant departure of the model from the data. ui: parameter of the main effect of the i-th flagging source (i = 1,..,4); uij: parameter of the two factor interaction between the i-th and the j-th flagging sources (i = 1,..,4; j = 1,..,4); ug: parameter of the gender effect (g = 0,1); ua: parameter of the age class effect (a = 0,1); uai: parameter of the two factor interaction between age and the i-th flagging source (a = 0,1; i = 1,..,4). Flagging sources: F1: self help volunteering groups (anonymous alcoholics and on treatment alcoholic groups); F2: Psychiatric Ambulatory; F3: Public Alcohology Service; F4: hospital discharges.