title: Effect of weekend 5-aminosalicylic acid (mesalazine) enema as maintenance therapy for ulcerative colitis: results from a randomized controlled study.
abstract: BACKGROUND
  5-aminosalicylic acid (5-ASA) is known to be effective in the treatment of active ulcerative colitis (UC). The aim of the current study was to investigate the effect of 5-ASA enemas, as a maintenance therapy for UC, when administered twice weekly as a weekend treatment regimen, compared to daily oral 5-ASA alone. We hypothesized that the weekend enema therapy would be better tolerated by patients who worked or attended school.
  
  
  METHODS
  Between January 2004 and August 2005, patients with UC, in whom remission of the condition had just been induced, were randomly assigned to either: the weekend 5-ASA enema group (n=11), who received 1 g 5-ASA enemas twice a week on Saturday and Sunday plus oral 5-ASA 3 g/day for 7 days, or to the daily oral 5-ASA use only group (n=13), who received only oral 5-ASA 3 g/day for 7 days. The primary endpoint of the study was defined as the incidence of relapse. The study was stopped after 24 patients had been enrolled because an interim analysis showed a significant benefit of the weekend 5-ASA enema group.
  
  
  RESULTS
  In the weekend enema group, 2 patients (18.2%) had relapses compared with 10 (76.9%) in the oral 5-ASA only group. The multivariate hazard ratio of relapse associated with weekend 5-ASA enema, relative to the oral alone group, was 0.19 (95% confidence interval, 0.04-0.94).
  
  
  CONCLUSIONS
  This study demonstrated the beneficial effects of adding weekend 1 g 5-ASA enema to daily 3 g oral 5-ASA as maintenance therapy for UC.
authors: Division of Gastroenterology, Department of Internal Medicine, Tohoku University Graduate School of Medicine, and Department of Gastroenterology, National Hospital Organization Sendai Medical Center, Japan. hir@mail.tains.tohoku.ac.jp
authors: Hiroshi
authors: H
authors: Yokoyama
authors: Sho
authors: S
authors: Takagi
authors: Shinichi
authors: S
authors: Kuriyama
authors: Shuichiro
authors: S
authors: Takahashi
authors: Hiroki
authors: H
authors: Takahashi
authors: Masahiro
authors: M
authors: Iwabuchi
authors: Seiichi
authors: S
authors: Takahashi
authors: Yoshitaka
authors: Y
authors: Kinouchi
authors: Nobuo
authors: N
authors: Hiwatashi
authors: Ichiro
authors: I
authors: Tsuji
authors: Tooru
authors: T
authors: Shimosegawa
mesh_terms: D000284:Administration, Oral; D000328:Adult; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000627:therapeutic use*; D003093:Colitis, Ulcerative / Q000188:drug therapy*; D004334:Drug Administration Schedule; D004733:Enema; D005260:Female; D006801:Humans; D008297:Male; D019804:Mesalamine / Q000627:therapeutic use*; D008875:Middle Aged; D016016:Proportional Hazards Models; D012008:Recurrence; D012074:Remission Induction; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D019804:Mesalamine