Definition of the sample
CDG
DILATION
A pilot study was conducted with 44 students for sample calculation, with the correct assessment rate as primary outcome. In this pilot group, the correct assessment rates were 24% in the Control Group and 58% in the CDG Group, with 80% statistical power and 5% alpha error. Therefore, sample size was calculated at 32 participants for each group: Cervical Dilation Guide (CDG) and Control, totaling 64 subjects.