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Table 1 Calculated hematological (RBC and RBC indices) RI for the screened population

From: Establishment of hematological reference intervals for healthy adults in Asmara

Parameter Sex N Mean 95% CI for mean Median Range 2.5th–97.5th‰ p-value (gender)
Red blood cells (RBC) (× 1012/L) Combined 591 4.9 4.9–5.04 5.04 3.4–6.4 4.07–6.02 0.000
Male 295 5.3 5.2–5.3 5.3 4.02–6.4 4.2–6.07
Female 296 4.7 4.7–4.8 4.7 3.2–6.1 4–5.7
Hemoglobin (Hgb) (g/dL) Combined 591 15.2 15.05–15.3 15.4 9.1–19.1 12.6–17.7 0.003
Male 295 15.4 15.2–15.5 15.7 9.9–19.1 12.6–17.8
Female 296 14.9 14.8–15.2 15 9.1–18.4 12.5–17.6
Hematocrit (Hct) (%) Combined 591 46.7 46.4–47.1 47.3 31.1–59.3 38.3–54.4 0.000
Male 295 49.3 48.8–49.7 49.9 38.4–59.3 40.5–55
Female 296 44.2 43.8–44.7 44.5 31.1–55.7 37.9–52
Mean cell volume (MCV) (fL) Combined 591 93.7 93.4–93.8 93.7 82.2–100.8 85.8–100 0.650
Male 295 93.8 93.3–94.2 93.6 83.6–100.2 85.7–100
Female 296 93.6 93.2–94.0 93.8 82.2–100.8 85.5–100
Mean cell hemoglobin (MCH) (g/dL) Combined 591 30.6 30.5–30.7 30.6 26.1–33.5 27.4 –32.8 0.005
Male 295 30.8 30.6–30.9 30.8 26.3–33.5 28–33
Female 296 30.4 30.2–30.5 30.5 26.1–33.5 26.5–32.6
Mean cell hemoglobin concentration (MCHC) (g/dL) Combined 591 32.6 32.6–32.7 32.9 29.5–34.3 30.2–33.8 0.001
Male 295 32.8 32.7–32.9 33.0 29.6–34.3 30.4–33.7
Female 296 32.4 32.3–32.6 32.8 29.5–34.1 30–33.7
Red cell distribution width (RDW) (%) Combined 591 13.6 13.5–13.7 13.5 11.6–19.1 12.3–15.6 0.775
Male 295 13.6 13.5–13.7 13.5 11.8–16.2 12.3–15.5
Female 296 13.6 13.5–13.7 13.4 11.6–19.1 12.3–17
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