Randomization, Blinding and Allocation
Eligible participants were randomized equally to either
placebo or chamomile groups. The randomization code
was computer-generated by the study biostatistician.
The randomization list was then given to the research
pharmacist who was not associated with the study.
The research pharmacist dispensed the study medication,
which was in packs provided by the manufacturer,
and enclosed it in numbered boxes per the
randomization scheme. All study participants as well
as all study personnel who assessed outcomes, worked
with study data, or administered tests or questionnaires
were unaware of the randomization list or treatment
assignment. At the final study visits participants
were also asked to indicate if they thought they had
received placebo or chamomile.