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Table 7 Randomised participant withdrawals (as of 17 Sep 2020)

From: Recruitment to a large scale randomised controlled clinical trial in primary care: the Helicobacter Eradication Aspirin Trial (HEAT)

Reason for withdrawal

Number of participants

Percentage of total randomised participants

Treatment phase

 Treatment sent but no response from the patient

224

4.18

 Incorrectly enrolled in the trial

17

0.32

 Adverse reaction to trial treatment

55

1.03

 Did not want to take medication/risk side effects

18

0.34

Follow-up

 Consent to active contact and use of electronic data withdrawn

73

1.36

 Consent to active follow-up contact withdrawn; continuing use of electronic data allowed

457

8.52

 Participant died or terminally ill

531

9.92

 Withdrawn at request of GP

37

0.69

 Withdrawal by the participant for health reasons

5

0.09