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This is an observation study of subjects who previously had iron-55 isotope administered in studies of iron absorption. By determining the retention of the isotope in blood during a 3-year period, body iron excretion can be measured.
One year following initial administration of iron-55 as a part of other related studies, subjects provide blood samples every 6 months for 3 years.
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| Measure | Description | Time Frame |
|---|---|---|
| Rate of Iron Excretion. | Iron excretion calculated as body Fe (mg) times turnover rate estimated from blood activity of Fe55 | 4 years |
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Inclusion Criteria:
Exclusion Criteria:
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Healthy adult men and women who previously participated in iron absorption studies using iron-55 isotope.
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| Name | Affiliation | Role |
|---|---|---|
| Janet R Hunt | USDA Grand Forks Human Nutrition Research Center | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| USDA Grand Forks Human Nutrition Research Center | Grand Forks | North Dakota | 58202 | United States |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 19386738 | Derived | Hunt JR, Zito CA, Johnson LK. Body iron excretion by healthy men and women. Am J Clin Nutr. 2009 Jun;89(6):1792-8. doi: 10.3945/ajcn.2009.27439. Epub 2009 Apr 22. |
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All enrolled participants were included
Participants were invited to join the study if they had participated in a study involving consumption of Iron-55 at least one year earlier at Grand Forks Human Nutrition Research Center
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| ID | Title | Description |
|---|---|---|
| FG000 | Male Subjects Having Consumed Iron-55 Tracer | |
| FG001 | Menstruating Women Having Consumed Iron-55 Tracer | Includes women on hormonal contraceptives |
| FG002 | Postmenopausal Women Having Consumed Iron-55 Tracer |
| Title | Milestones | Reasons Not Completed | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall Study |
|
|
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| ID | Title | Description |
|---|---|---|
| BG000 | Male Subjects Having Consumed Iron-55 Tracer | |
| BG001 | Menstruating Women Having Consumed Iron-55 Tracer | Includes women on hormonal contraceptives |
| Units | Counts |
|---|---|
| Participants |
|
| Title | Description | Population Description | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Denominator Units Selected | Denominators | Classes |
|---|---|---|---|---|---|---|---|---|---|
| Age, Continuous | Mean |
| Type | Title | Description | Population Description | Reporting Status | Anticipated Posting Date | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Time Frame | Units Analyzed | Denominator Units Selected | Arm/Group Information | Denominators | Classes | Analyses | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Primary | Rate of Iron Excretion. | Iron excretion calculated as body Fe (mg) times turnover rate estimated from blood activity of Fe55 | Per protocol | Posted | Mean | 95% Confidence Interval | milligrams per day | 4 years |
|
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| ID | Title | Description | Deaths (Affected) | Deaths (At Risk) | Serious Events (Affected) | Serious Events (At Risk) | Other Events (Affected) | Other Events (At Risk) |
|---|---|---|---|---|---|---|---|---|
| EG000 | Male Subjects Having Consumed Iron-55 Tracer |
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| Title | Organization | Phone | Extension | |
|---|---|---|---|---|
| Janet Hunt, PhD | USDA Grand Forks Human Nutrition Research Center | 701-795-8353 | janetrhunt@gmail.com |
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| BG002 |
| Postmenopausal Women Having Consumed Iron-55 Tracer |
| BG003 | Total | Total of all reporting groups |
| years |
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| Sex: Female, Male | Count of Participants | Participants |
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| Units | Counts |
|---|---|
| Participants |
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|
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| 0 |
| 29 |
| 0 |
| 29 |
| EG001 | Menstruating Women Having Consumed Iron-55 Tracer | Includes women on hormonal contraceptives | 0 | 19 | 0 | 19 |
| EG002 | Postmenopausal Women Having Consumed Iron-55 Tracer | 0 | 5 | 0 | 5 |
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