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Table 1 Surgical trial datasets

From: Clustering in surgical trials - database of intracluster correlations

Trial Surgical intervention(s) N No. Outcomes No. Surgeon No. Centres
CLIVIT [26] Thyroid surgery with clips or ligatures 491 5 125 13
DISPACT [27] Distal pancreatectomy with stapler or hand-sewn closure 352 6 126 21
FILMS [28] Macular hole surgery with/without peeling of Intra-limiting membrane. 138 19 N/A 9
HERNIA [29] Open vs. laparoscopic Inguinal hernia repair 928 41 31 24
INSECT [30] Midline laparotomy with one of three closure methods 625 6 191 24
KATMETAL [6] Total knee arthroplasty with/without metal backed tibial component 409 26 16 8
KATMOBILE [6] Total knee arthroplasty with/without mobile bearing between tibial and femoral components 539 26 24 13
KATPATELLA [6] Total knee arthroplasty with/without patella resurfacing 1370 26 99 27
RELFUX [10] Laparoscopic fundoplication 178 20 31 19
STARS [31] Reduction and fixation, bipolar hemiarthroplasty or total hip arthroplasty 298 23 49 11