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Table 1 Characteristics of included trials

From: Do investigator meetings improve recruitment rates in clinical trials? A retrospective before-and-after study of data from nine multi-centre clinical trials

Characteristic

Trials (n = 9) (%)

Type of trial

 CTIMP

3 (33%)

 Device

1 (11%)

 Intervention

5 (56%)

Stage of trial

 Definitive

6 (67%)

 Feasibility

3 (33%)

Funding type

 NIHR

8 (89%)

 Industry

1 (11%)

Clinical area

 Dermatology

3 (33%)

 Diabetes

1 (11%)

 Gastroenterology

1 (11%)

 Hand surgery

1 (11%)

 Pregnancy and childbirth

2 (22%)

 Sexual health

1 (11%)

Population

 Adults

6 (67%)

 Paediatric

2 (22%)

 Adults and paediatric

1 (11%)

Sample size

 Mean (SD)

549.6 (648.6)

 Median (IQR)

269 (180, 517)

 Min, Max

50, 1900

Length of recruitment (months)

 Mean (SD)

23.6 (11.7)

 Median (IQR)

22.4 (17.1, 26.1)

 Min, Max

10.0, 44.4

Number of sitesa

 Mean (SD)

13.9 (8.1)

 Median (IQR)

16 (8, 22)

 Min, Max

3, 25

  1. All data are N (%) unless otherwise stated
  2. CTIMP Clinical Trial of an Investigational Medicinal Product, IQR interquartile range, NIHR National Institute for Health Research (any programme)
  3. aOne trial was international and for this study only the UK sites are included