*3.2. Participants' Characteristics*

Fifty-one participants were primiparas (26 in the experimental group and 25 in the control group) and 37 multiparas (18 in the experimental group and 19 in the control group). No statistical differences in sample terms were detected (*χ* <sup>2</sup> = 0.04, *p* = 0.84).

The average age of the participants was 31 years (*SD* = 5.64) in the experimental group and 32.11 years (*SD* = 5.60) in the control group, and the difference was not significant (*t* = −0.43, *p* = 0.67).

The mean duration of labor was 2.47 hours (*SD* = 1.51) in the experimental group and 2.32 hours (*SD* = 1.59) in the control group, and the difference was not significant (*t* = 0.21, *p* = 0.84).

The averages of the Apgar index at 1 min (experimental group: *M* = 8.00, *SD* = 0.82; Control group: *M* = 8.11, *SD* = 1.27; *t* = −0.23, *p* = 0.82) and at 5 min (experimental group: *M* = 8.90, *SD* = 0.32; Control group: *M* = 9.00, *SD* = 0.50; *t* = −0.53, *p* = 0.60) did not differ significantly between groups.

The absence of statistically significant differences on the variables reported made the groups comparable.
