Frequency of the occult blood in the urine in the community

In the course of the screening examination of the adult diseases, 2692 inhabitants of the community were examined the occult blood in the urine with N-multisticks (Ames Co.) from April to October, 1977, and the following results were obtained. 1) The positive rate of the occult blood in the urine was 16.3% of the examinee, but the rate of female (17.7%) was higher than that of male (12.0%), and the positive rate of the occult blood in the urine became higher with increase in age. 2) Following the cystitis of the urinary bladder the kidney disease was the most prevalent disease among the past history of the urinary tract diseases, and the pollakisuria was the commonest complaints. 3) In the positive cases of the occult blood in the urine, 93.4% of which was protein negative or questionable positive in the urine, but 6.6% of which was protein positive, and this group must have a precise examination. 4) In 61.8% of the positive cases of the occult blood in the urine, the hematuria was observed microscopically in the urinary sediments, and in 1.6% of the positive cases of the occult blood in the urine many cylinders were observed. From the above results, we concluded that it was necessary to add the occult blood examination to the urinary screening examination of the adult diseases.