Intervention studies
Of the 30 intervention studies, 11 were conducted in the
USA (37%), two in Canada (7%), two in Australia (7%),
and 15 (52%) were in less-developed countries (table 1). The
studies from the USA were predominantly in day care
centres or school settings (10/11, 91%) and one study was
done in an elder-care center. All studies in Australia and
Canada were done in schools or day care centres. Studies
from less-developed countries were conducted primarily
within the community or among families and one study was
set in a refugee camp.