[The effectiveness of the essential laboratory tests in daily primary care--view of a physician at a private clinic].

I put into practice, "The essential laboratory tests (a proposal)" published by Japan Society of Clinical Pathology in 1989 on new patients who visited my clinic. It was useful not only for screening of diseases, but enhanced the probability of diagnosis. I could discover hidden abnormalities unrelated to the patient's complaints. Therefore, the condition of the patient could be judged theoretically and scientifically by the use of the essential laboratory tests.