Examlex
Purposive and other non-random methods of sampling are the most common kinds of sampling approaches in observational studies.
Hemoglobin
The combination of a protein and iron pigment in the red blood cells that attracts and carries oxygen in the body.
Red Blood Cells
Cells found in blood that are responsible for carrying oxygen from the lungs to the body's tissues and returning carbon dioxide from the tissues back to the lungs.
Anemia
A condition characterized by a lack of enough healthy red blood cells to carry adequate oxygen to the body's tissues, resulting in fatigue and weakness.
Hematocrit
A blood test measurement that indicates the percentage of red blood cells in a volume of blood.
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