10.2.1  Publication bias

Introductory text

Figure 10.2.a: Cumulative full publication of results initially presented as abstracts from 45 studies reporting time to publication that followed up research presented at meetings and conferences

Table 10.2.a: Publication status of five cohorts of research projects approved by ethics committees or institutional review boards which had been completed and analysed at the time of follow up.  (Adapted from Hopewell et al, (Hopewell 2008)).

Figure 10.2.b: Publication bias in clinical trials due to statistical significance or direction of trial results (adapted from Hopewell et al. (Hopewell 2008)).

10.2.1.1 Time lag bias

10.2.1.2 Who is responsible for publication bias?

10.2.1.3 The influence of external funding and commercial interests