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Table 1 The calculated population biochemical reference values for participants screened

From: Biochemistry reference intervals for healthy elderly population in Asmara, Eritrea

Analyte All N Mean 95% CI for mean Median Range 2.5th–97.5th percentile P value (sex)
Aspartate aminotransferase (AST), IU/L Combined 251 21.4 20.8–22.0 20.6 13–41 13.8–33.2 0.269
Female 133 21.6 20.8–22.6 21.0 13–41 14.4–34.0
Male 118 21.0 20.2–21.8 21.0 12–33 13.0–32.0
Alanine aminotransferase (ALT), IU/L Combined 249 16.6 16.0–17.7 15.0 8–41 9.0–35.4 0.224
Female 133 16.7 15.5–18.0 21.0 8–41 9–35.7
Male 116 17.0 15.8–18.2 16 8–29 8.0–29.0
Alkaline phosphatase (ALP), IU/L Combined 246 95.5 92.8–98.3 95.0 43–153 55.4–156.0 0.329
Female 129 96.9 90.5–97.9 95.0 43–145 55–165
Male 117 94.2 92.8–101.1 95.0 52–153 51.7–153
Creatinine, mg/dL Combined 242 0.95 0.9–1.0 0.9 0.4–2.0 0.6–1.5 0.001
Female 115 4.3 0.9–0.94 0.9 0.4–1.6 0.6–1.5
Male 127 4.4 1.0–1.05 1.0 0.7–2.0 0.7–1.9
Blood urea nitrogen, mg/dL Combined 245 13.5 13.0–14.0 13.0 6–41 7.1–22.0 0.388
Male 116 13.5 12.6–14.4 16.0 6–41 7.0–26.5
Female 129 13.5 12.9–14.0 13 7–22 8.0–21.0
Bilirubin (total), mg/dL Combined 244 0.8 0.74–0.80 0.7 0.4–2.2 0.4–1.3 0.034
Male 112 0.8 0.75–0.85 0.7 0.4–2.2 0.4–1.69
Female 126 0.7 0.7–0.77 0.7 0.4–1.5 0.4–1.20
Bilirubin (direct), mg/dL Combined 245 0.69 0.06–0.79 0.07 0.0–0.57 0.0–0.26 0.000
Male 116 0.05 0.04–0.07 0.0 0.0–0.37 0.0–0.3
Female 129 0.08 0.07–0.1 0.09 0.0–0.57 0.0–0.25
Bilirubin (indirect), mg/dL Combined 245 0.16 0.12–0.20 0.00 0.0–1.9 0.0–1.0 0.000
Male 116 0.03 0.0–0.06 0.00 0.0–1.9 0.0–0.66
Female 129 0.28 0.21–0.35 0.00 0.0–1.9 0.0–1.15