Table 2.

Amenorrhea rates at 3 and 6 months of LNG IUS use stratified by baseline menstrual characteristics (n=1802)

	Number at 3 months	Amenorrheic at 3 months (n=88)	Number at 6 months	Amenorrheic at 6 months (n=266)
Amount of bleeding
Light	353	27 (7.7)	353	71 (20.1)
Moderate	1019	50 (4.9)	1019	146 (14.3)
Moderately Heavy	292	8 (2.7)	292	36 (12.3)
Heavy	134	3 (2.2)	134	10 (7.5)
		p=0.027		p<0.001
Duration of Flow
1–3 days	255	23 (9.0)	255	47 (18.4)
4–6 days	1322	58 (4.4)	1322	195 (14.8)
≥7 days	221	7 (3.5)	221	22 (10.0)
		p=0.016		p=0.025

Note: p-values in Table 2 represent the association of each baseline bleeding characteristic with amenorrhea at both 3 and 6 months.

Data are presented as n (%).

LNG-IUS = levonorgestrel intrauterine system