RESULTS
In the trial 71 DCCs participated. After randomization,
there were 36 intervention DCCs and 35 control
DCCs. Of 1981 parents invited to participate, 766
gave informed consent for their child (response rate
39%) (Fig. 1). Of 766 children, 553 were eligible for inclusion.
Of 553 children, five parents did not return
any of the calendar pages with incidence data and
three parents did not return any pages during followup,
therefore 545 children were included in the analyses.
For 19 of 545 children, baseline incidence data
were missing.