A total of 36 preterm infants who met criteria participated and were randomly assigned to the massage or control
group. Of the 36 preterm infants tested, 32 infants provided usable data (16 massage and 16 control). Data were lost
for four infants (two massage and two control) due to equipment malfunction. Additionally, data were lost for one
additional infant (control) due to experimenter error when saving the stress data; fortunately, the activity data for that
infant were saved. Demographic data for the two groups are provided in Table 1.