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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