Table 2.

Inclusion and exclusion criteria of young people who do not menstruate (YNM)

YNM
Inclusion criteria	Exclusion criteria
Are between 11 and 16 years old	Are below 11 or above 16 years old
Are attending a participating school	Have (or will) menstruate
Have not (and will not) menstruate	Cannot understand and/or provide consent
Have given their consent to participate	Cannot communicate well in Catalan or Spanish
Parents or legal tutors have signed the consent form
Have a good command of Catalan or Spanish