Latent variables are involved in almost all kinds of regression models. In a broad sense, all additive error terms in regression models are latent variables simply because they are not measured in research. Hereafter, however, a narrower sense of latent variables is used when referring to latent variable models.
There are four common nursing care model s: functional nursing, team nursing, p rimary nursing, and case management nursing. T he two models of care used in. this study are the functional nursing and team nursing. Functional nursing is a model in which care is organized and provided according to th e. task.
1 Patient-centered care. The focus of functional medicine is on patient-centered care, promoting health as a positive vitality, beyond just the absence of disease.  An integrative, science-based healthcare approach.