Respiratory rate (RR). The normal reference range for
RR in this age group is 18 to 30 breaths/min.20 The mean
RRs for both groups were similar at the start of the study
(Table 1) and were within normal range. The Friedman test
revealed no statistically significant change over time for
either group, with the treatment group increasing slightly
from a mean reading of 20 to 21 breaths/min