Results
A total of 1246 participants were included in the final analysis and 26 were lost to follow-up after randomisation (2.0%) (PAL study parent and infant demographicsReported as number (%) and p value calculated using χ*Reported as median (IQR), p value calculated using Wilcoxon-Mann-Whitney test.†Reported as mean (SD), p value calculated using independent samples t-test.PAL, paediatric advice line.A total of 586 calls were recorded during the study. A total of 230 parents (18.5%) called the PAL at least once during the first 2 years of their participation in the trial. Of these, 69 (30%) contacted the PAL on only one occasion (inclusive of subsequent follow-up calls) and 161 (70%) on multiple occasions.