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Table 3 Number of studies (n = 51) requesting at least one variation of contract (additional funds, time or both) by reason/issue

From: Opportunities and challenges of delivering digital clinical trials: lessons learned from a randomised controlled trial of an online behavioural intervention for children and young people

Reason for request

Type of request

Number of approved requests for funds

Funds

Duration

Funds and duration

Other

Requests

Recruitment issues

1

9

10

0

N = 20

Requesting funds =11

11/11

Retention/follow-up issues

1

2

1

0

N = 4

Requesting funds = 2

2/2

Staff issues/volume of work

1

0

4

0

N = 5*

Requesting funds = 5

3/5

Other/not clearly specified

2

1

2

3

N = 8

Requesting funds = 4

4/4

  1. Seven studies requested more than 1 variation to contract
  2. *Two of the 5 staff issues were linked to issues with recruitment