Table 1.
Checklist of retention content for PIL.
Fig 1.
Identification of a cohort of trials.
Table 2.
Characteristics of included trials.
Fig 2.
The length of patient information leaflets (n = 46a).
a The date on four patient information leaflets could not be identified.
Table 3.
Frequency of trial information communicated within PIL and protocols.
Fig 3.
Frequency of communication about patient withdrawal within PIL and protocols (n = 50).
Table 4.
Consistency of retention communication between trial documents.
Table 5.
Recommendations for retention content within PIL.