Table 2.

Estradiol results expressed as median values (interquartile range).

	DMPA-IM			Copper IUD			LNG implant			DMPA vs. IUD	DMPA vs. implant	Implant vs. IUD
E2 pmol/L	n	Median	IQR	n	Median	IQR	n	Median	IQR	p	p	p
Baseline	131	229	152–455	135	235	168–426	134	216	153–419	0.89	0.80*	0.40*
6 months	131	139	97–193	135	298	163–467	132	156	112–250	<0.0001*	0.005	0.004
P (change from baseline)		<0.0001*			0.51			0.0002*

E2, estradiol; DMPA, depot medroxyprogesterone acetate; IUD, intrauterine device; LNG, levonorgestrel; CI, confidence interval; IQR, interquartile range; ^* Mann Whitney U test.