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. 2005 Apr 20;2005(2):CD003145. doi: 10.1002/14651858.CD003145.pub2

Hasegawa 2003.

Methods RCT 
 no sample size calculation; 
 randomisation preoperative; 
 no conversion.
Participants n = 50; 
 Inclusion: T2 or T3 colorectal cancer (N0). 
 Exclusion: Tis and T1 stage, upper and lower rectum, transverse colon, T4 tumors, liver metastasis, peritoneal dissemination.
Interventions laparoscopic vs. conventional 
 Conversions: none. 
 Tumor location: cecum, ascending colon, descending colon, sigmoid, rectosigmoid. 
 Type of resection: not stated.
Outcomes Main study criterium: not stated. 
 Data given for: operative time, blood loss, length of incision, cytokine levels (IL‐6), CrP, NK‐cell activity, duration of postoperative ileus, duration of additional analgetic requests, morbidity, postoperative hospital stay.
Notes Laparoscopic technique: gas insufflation. 
 Conventional incision: not stated 
 Anesthesia/Analgesia: thoracic epidural, i.m. on demand. 
 Analgetic drugs: epidural bupivacaine / morphine; additional pentazocine i.m. 
 Evans & Pollock: Design 24, Analysis 9, 
 Presentation 10, Total 43.
Risk of bias
Bias Authors' judgement Support for judgement
Allocation concealment? Unclear risk B ‐ Unclear