Conclusions
RA, ’s head circumference, HL
RECRUITMENT
The proportions of parents with high HL category significantly increased for total HL and the child health management and health management domains in the intervention group. Besides, the HL scores improved after the intervention for total HL and 4 domains in both groups. Our results suggest the potential of a smartphone app (KhunLook) to improve HL as well as to promote superior accuracy of parents’ assessment of their child’s head circumference and development, all with a similar effect on weight, height, nutrition and feeding, and immunization as in traditional interventions. Thus, this intervention, KhunLook app, has the potential to be useful and more convenient for promoting a healthy child preventive care during early childhood in families.This study was funded by the Health Systems Research Institute, Ministry of Public Health Thailand. The funders had no role in study design, conduct, or reporting of the trial. The authors thank all the participants in the trial as well as Marisa Klangkhumpa and Sakuntala Supasai for help with data collection, the pediatric out-patient staff for help with the recruitment, the well-child clinic physicians for child health supervision care, and Piangjit Tharnprisan for her invaluable help on data analysis (data processing and interpretation of results).Authors' Contributions: RA is the principal investigator of this randomized controlled trial. The study was conceptualized and designed together with S Saengnipanthkul, KS, PL, S Sutra, P Pornprasitsakul, and P Paopongsawan. RA and S Saengnipanthkul were responsible for developing the intervention content with support from KS, PL, S Sutra, P Pornprasitsakul, and P Paopongsawan. KS contributed to the technical support of the KhunLook app throughout the study and computing the randomization sequence. RA, S Saengnipanthkul, PL, S Sutra, P Pornprasitsakul, P Paopongsawan, and KS contributed to the development of the KhunLook app. RA and S Saengnipanthkul drafted the manuscript and all authors have approved the final draft and submitted manuscript.Conflicts of Interest: None declared.CONSORT eHEALTH checklist (V 1.6.1).Proportions of parents' health literacy by category before and after the intervention by subgroup.