['The use of a UV-box disconnect system reduces the incidence of peritonitis as compared with manual exchanges. An integrated disconnect system (IDS) also gives good results. See Figure 1. From 1988-1991, we prospectively compared two groups of patients using either a UV-box disconnect system (Baxter, n = 18, mean age 64, range 28-75 yrs) or an IDS (Baxter, n = 25, mean age 53, range 30-78). The Tenckhoff catheter had been inserted by the same technique in all patients, and the training program and nursing care were also identical. Since many younger patients preferred IDS and refused randomization, age was significantly lower in the IDS group. All peritonitis episodes (PER) were registered. Excluded from calculations of PER were episodes most probably not due to failure in connective device: PER after incidental penetration of the dialysis bags, deep penetrating tunnel infections and in the direct course of abdominal surgery.', 'There were significantly fewer months with PER (one month = 1 PER; Chi-2 = 6.45, p < 0.05) in patients using the IDS (3 PER/269 months) compared with those using the UV-box system (15 PER/355 months). The IDS was requested mainly by younger patients, while some older patients found it to be too complicated.'] Does cAPD bag changing with integrated disconnect system give lower incidence of peritonitis than with UV-box system?