Trait controlled by the both environment and genetic factor. Usually, multifactorial traits outside of illness result in what we see as continuous characteristics in organisms, especially human organisms such as: height, skin color, and body mass.
I recently took a drug test for a job. I tested positive for opiates in my urine. I do not and have never taken drugs of any sort other than alcohol. I dont take any prescription drugs, how is it possible that this happened. I hade consumed some beer about12 hours before the test.
One review found that 60 percent of patients who abused opioids scored low, rather than high, on one widely used screening questionnaire. Subsequently, doctors have turned to urine tests. There are two basic types and they vary markedly in accuracy and cost. The basic screen is known as qualitative test.