RESULTS	An analysis of the costs related to the use of antibiotics , outpatient visits , and hospital stays necessary for the treatment of peritonitis and ESI and those related to training time , additional equipment , and consumables required for the three CAPD techniques showed that , overall , the cost in O was the lowest , followed by U and C ( U.S. $ 158 , $ 170 , and $ 179 per patient-month , respectively ) .\