Even then, the sheer complexity of the diet, as well as the multifactorial origins of chronic diseases, makes it difficult to prove causal links.
Human disorders attributable to multifactorial inheritance alcoholism Alzheimer disease cancer coronary heart disease diabetes epilepsy hypertension obesity schizophrenia About 1 out of 150 live newborns has a detectable chromosomal abnormality.
The causes of the illness are multifactorial and include genetic and biological risk factors, developmental factors that may to contribute to a negative subjective body image, a lack of awareness of internal feelings (including hunger and emotions), a family history of eating disturbances, social influence, and psychological factors.
Most human genetic defects can be categorized as resulting from either chromosomal, single-gene Mendelian, single-gene non-Mendelian, or multifactorial causes.
As in eastern Africa, where violence intersected with the intensifying activities of slave raiders, so in Southern Africa the violence of this period is multifactorial and needs to be more closely analyzed.
Most of the common hereditary birth defects, however, are multifactorial.
Such common conditions as cancer, heart disease, and diabetes are now considered to be multifactorial disorders.
Because the genetic and environmental factors that underlie multifactorial disorders are often unknown, the risks of recurrence are usually arrived at empirically.
In general, it can be said that risks of recurrence are not as great for multifactorial conditions as for single-gene diseases and that the risks vary with the number of relatives affected and the closeness of their relationship.
The counselor, a certified health-care professional with special training in medical genetics, must then decide whether the disease in question has a strong genetic component and, if so, whether the heredity is single-gene, chromosomal, or multifactorial.
Genetic disorders that are multifactorial in origin represent probably the single largest class of inherited disorders affecting the human population.
