Table 2.

Athletes with Primary Amenorrhea, Secondary Amenorrhea, and Oligomenorrhea

Condition	Total, n (%) (N = 249)	Aesthetic Sport Athletes,a n (%) (n = 21)	Endurance Sport Athletes,b n (%) (n = 77)	Team/Anaerobic Sport Athletes,c n (%) (n=151)	P Valued
Primary amenorrheae	0.8	0.0	1.3	0.7	.80
Secondary amenorrheaf	7.2	9.5	9.1	6.0	.63
Oligomenorrheag	20.1	19.0	13.0	23.8	.08

^aAesthetic sports consisted of diving, gymnastics, dance team, cheerleading, and pom-pon squad..

^bEndurance sports consisted of basketball, cross-country, soccer, and track (middle distance and distance).

^cTeam/anaerobic sports consisted of tennis, volleyball, swimming, softball, golf, and track (field events and sprints).

^d Frequency differences between sport types (χ² test).

^eDefined as the onset of menses at age 15 years or later.

^fDefined as the lack of menstruation for 3 or more months after the onset of menses.

^gDefined as menstrual cycles occurring 35 or more days apart.