Table 3.

Randomisation descriptions

Randomisation information	Number of trials (n = 229)/PILs (n = 280)
Individual level randomisation	224 trials (97.8%)
Cluster level randomisation	5 trials (2.2%)
PILs with no explanation of randomisation	21 PILs (9.17%)
PILs with non-text supporting material to describe randomisation	11 PILs plus 1 video animation (4.3%)
Randomisation ratio
Randomisation ratio 1:1	1 PIL (0.4%)
Randomisation ratio indicated to be 1:1	184 PILs plus 1 video animation (66.1%)
Randomisation ratio not 1:1	5 PILs (1.8%)
Randomisation ratio unclear	90 PILs (32.1%)