Trial Outcomes & Findings for Effect of Race on Gonadotropin Responses (NCT NCT00455962)

Last Updated: 2017-07-27

Results Overview

Estradiol levels are consistently higher in African-American vs Caucasian women across the menstrual cycle. This study was designed to determine if African-American women are more sensitive to estrogen positive feedback to generate the preovulatory LH surge using a controlled estrogen infusion paradigm.

Recruitment status

COMPLETED

Study phase

PHASE1/PHASE2

Target enrollment

23 participants

Primary outcome timeframe

5 days of estradiol and progesterone infusion

Results posted on

2017-07-27

Participant Flow

Participant milestones

Participant milestones
Measure	African American Women Healthy African-American women 18-35 years old Estradiol steroid infusion: Estradiol infusion of 0.1 mcg/kg/hr for 12 hr, 0.135 mcg/kg/hr for 12 hr, 0.165 mcg/kg/hr for 12 hr and 0.2 mcg/kg/hr for 60 hr Progesterone steroid infusion: Progesterone infusion of 4.77 nmol/kg/hr (1.5 mcg/kg/hr) for 24 hr and 6.36 nmol/kg/hr (2 mcg/kg/hr) for the final 24 hr	Caucasian Women Healthy Caucasian women 18-35 years old Estradiol steroid infusion: Estradiol infusion of 0.1 mcg/kg/hr for 12 hr, 0.135 mcg/kg/hr for 12 hr, 0.165 mcg/kg/hr for 12 hr and 0.2 mcg/kg/hr for 60 hr Progesterone steroid infusion: Progesterone infusion of 4.77 nmol/kg/hr (1.5 mcg/kg/hr) for 24 hr and 6.36 nmol/kg/hr (2 mcg/kg/hr) for the final 24 hr
Overall Study STARTED	10	13
Overall Study COMPLETED	10	13
Overall Study NOT COMPLETED	0	0

Reasons for withdrawal

Withdrawal data not reported

Baseline Characteristics

Effect of Race on Gonadotropin Responses

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure	African American Women n=10 Participants Healthy African-American women 18-35 years old Estradiol steroid infusion: Estradiol infusion of 0.1 mcg/kg/hr for 12 hr, 0.135 mcg/kg/hr for 12 hr, 0.165 mcg/kg/hr for 12 hr and 0.2 mcg/kg/hr for 60 hr Progesterone steroid infusion: Progesterone infusion of 4.77 nmol/kg/hr (1.5 mcg/kg/hr) for 24 hr and 6.36 nmol/kg/hr (2 mcg/kg/hr) for the final 24 hr	Caucasian Women n=13 Participants Healthy Caucasian women 18-35 years old Estradiol steroid infusion: Estradiol infusion of 0.1 mcg/kg/hr for 12 hr, 0.135 mcg/kg/hr for 12 hr, 0.165 mcg/kg/hr for 12 hr and 0.2 mcg/kg/hr for 60 hr Progesterone steroid infusion: Progesterone infusion of 4.77 nmol/kg/hr (1.5 mcg/kg/hr) for 24 hr and 6.36 nmol/kg/hr (2 mcg/kg/hr) for the final 24 hr	Total n=23 Participants Total of all reporting groups
Age, Continuous	28 years n=5 Participants	28 years n=7 Participants	28 years n=5 Participants
Sex: Female, Male Female	10 Participants n=5 Participants	13 Participants n=7 Participants	23 Participants n=5 Participants
Sex: Female, Male Male	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants
Ethnicity (NIH/OMB) Hispanic or Latino	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants
Ethnicity (NIH/OMB) Not Hispanic or Latino	10 Participants n=5 Participants	13 Participants n=7 Participants	23 Participants n=5 Participants
Ethnicity (NIH/OMB) Unknown or Not Reported	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants
Race (NIH/OMB) American Indian or Alaska Native	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants
Race (NIH/OMB) Asian	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants
Race (NIH/OMB) Native Hawaiian or Other Pacific Islander	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants
Race (NIH/OMB) Black or African American	10 Participants n=5 Participants	0 Participants n=7 Participants	10 Participants n=5 Participants
Race (NIH/OMB) White	0 Participants n=5 Participants	13 Participants n=7 Participants	13 Participants n=5 Participants
Race (NIH/OMB) More than one race	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants
Race (NIH/OMB) Unknown or Not Reported	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants
Region of Enrollment United States	10 participants n=5 Participants	13 participants n=7 Participants	23 participants n=5 Participants

PRIMARY outcome

Timeframe: 5 days of estradiol and progesterone infusion

Population: Healthy African-American and Caucasian women aged 18-35 with regular ovulatory menstrual cycles.

Outcome measures

Outcome measures
Measure	African American Women n=10 Participants Healthy African-American women 18-35 years old Estradiol steroid infusion: Estradiol infusion of 0.1 mcg/kg/hr for 12 hr, 0.135 mcg/kg/hr for 12 hr, 0.165 mcg/kg/hr for 12 hr and 0.2 mcg/kg/hr for 60 hr Progesterone steroid infusion: Progesterone infusion of 4.77 nmol/kg/hr (1.5 mcg/kg/hr) for 24 hr and 6.36 nmol/kg/hr (2 mcg/kg/hr) for the final 24 hr	Caucasian Women n=13 Participants Healthy Caucasian women 18-35 years old Estradiol steroid infusion: Estradiol infusion of 0.1 mcg/kg/hr for 12 hr, 0.135 mcg/kg/hr for 12 hr, 0.165 mcg/kg/hr for 12 hr and 0.2 mcg/kg/hr for 60 hr Progesterone steroid infusion: Progesterone infusion of 4.77 nmol/kg/hr (1.5 mcg/kg/hr) for 24 hr and 6.36 nmol/kg/hr (2 mcg/kg/hr) for the final 24 hr
LH Peak in Response to Estrogen Positive Feedback	80.3 IU/L Standard Error 13.3	73.1 IU/L Standard Error 11.6

Adverse Events

African American Women

Serious events: 0 serious events

Other events: 0 other events

Deaths: 0 deaths

Caucasian Women

Serious events: 0 serious events

Other events: 0 other events

Deaths: 0 deaths

Serious adverse events

Adverse event data not reported

Other adverse events

Adverse event data not reported

Additional Information

Janet E. Hall, MD

Massachusetts General Hospital

Phone: 617-877-1112

Email: [email protected]

Results disclosure agreements

Principal investigator is a sponsor employee
Publication restrictions are in place