Table 1 Outcome measures
Outcome | Collected by | Timing of collection | Source |
|---|---|---|---|
Primary outcome | Â | Â | Â |
   Number of absence episodes due to any illness1,2 | Telephone interview | 8 - 9 days after the date of the first day of absence from school | Parents of children |
Secondary outcomes | Â | Â | Â |
'Follow-up children' | Â | Â | Â |
   Number of absence episodes due to respiratory illness | Telephone interview | 8 - 9 days after the date of the first day of absence from school | Parents of children |
   Number of absence episodes due to gastrointestinal illness | Telephone interview | 8 - 9 days after the date of the first day of absence from school | Parents of children |
   Length of illness episode | Telephone interview | 8 - 9 days after the date of the first day of absence from school | Parents of children |
   Length of absence episode | Telephone interview | 8 - 9 days after the date of the first day of absence from school | Parents of children |
   Number of household members who become ill within one week of the participating child's illness onset | Telephone interview | 8 - 9 days after the date of the first day of absence from school | Parents of children |
All children | Â | Â | Â |
   Number of absence episodes for any reason | Liaison research assistant3 | Weekly | School roll |
   Length of absence episode | Liaison research assistant3 | Weekly | School roll |
Adverse events | Â | Â | Â |
   Skin reactions1 | Telephone interview | Following the intervention period | Parents of children |