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Table 2 Statements where consensus was reached following rounds 1 and 2

From: Developing principles for sharing information about potential trial intervention benefits and harms with patients: report of a modified Delphi survey

‘Consensus in’: over 70% of respondents agreed with the following statements

Statement no.

Statement

 2

Potentially serious harms need to be emphasised, even if they are very rare

 3

Potential benefits and harms of a clinical trial need to be compared with what happens if the participant does not take part in the trial

 7

The most likely potential benefits should be described

 8

Any likely benefits to the participant (including embryos, foetus, nursing infants) should be described

 9

General potential benefits (such as ‘the medicine may help you and your cancer’) should be described

 10

Concrete, specific potential benefits (such as ‘this medicine is designed to enable you to walk farther before becoming breathless’) should be described

 15

The harms should be separated into serious (life-threatening, causing permanent damage) and less serious (like a mild headache that goes away quickly)

 16

Not all potential harms are known, especially for new treatments that have not been studied extensively. Participants need to know that not all potential harms can be listed

 17

Sometimes harms are discovered after the trial begins. As soon as they are discovered, participants need to be told about them

 18

Risks to conceiving/fathering a child, pregnancy or breastfeeding should be emphasised

 21

Potential trial harms should be described in such a way that they can be compared to what would happen if the participant did not take part in the trial

‘Consensus out’: over 70% of respondents disagreed with the following statements

Statement no.

Statement

 5

Benefits are never completely certain, so they should not be described

 6

Potential benefits should be described more fully than potential harms

 12

Participants should not be told about potential harms

 14

Only the most common possible harms should be mentioned. This will focus the reader’s attention and minimise overload

 24

Information about potential benefits or harms should be presented apart by one or more pages