... over dispersion and the “ excess” zeros in the data[28]. The ZINB modelsimultaneously models the contribution of the indepen-dent variables on: (1) the probability of having any men-tal health ... healthstatus may be a proxy, the managem ent of some condi-tions may be neglected if others consume attention[41].Alternatively, these individuals ma y have their mentalhealth care needs addressed within ... elderly population: the cache county study. Arch GenPsychiatry 2000, 57:601-7.20. Hawker GA, Wright JG, Coyte PC, Williams JI, Harvey B, Glazier R, Wilkins A,Badley EM: Determining the need...