Hematology Reference Intervals for Healthy Adults of the City of Sulaymaniyah, Iraq

Figures & data

Table 1 Reference Intervals for Hematological and Serum Biochemical Parameters for Male and Female Adults

Parameters	Male (n=313)		Female (n=449)
	Mean±SD	95% CI	Mean±SD	95% CI
Age (years)	40.9±14.6	39.3–42.5	38.5±13.1	37.3–39.7
RBCs (10^12/L)	5.2*±0.4	5.1–5.2	4.5±0.4	4.5–4.6
Hb (g/L)	155*±9	154–156	136±8	135–137
Hct (L/L)	0.452*±0.21	0.449–0.455	0.397±0.29	0.395–0.400
MCV (fL)	86.6±3.9	86.2–87.1	87.3±4.1	86.9–87.6
MCH (pg)	29.7±1.6	29.6–29.9	29.9±1.6	29.8–30.1
MCHC (g/L)	342±7	342–343	342±7	342–343
RDW (%)	13.5 ±0.9	13.4–13.6	13.9±1.0	13.9–14
Platelets (10^9/L)	226.1*±50.9	220.4–231.8	263.5±59.3	258–269
MPV (fL)	8.9 ±0.9	8.8–9.0	9.1±1.0	9.0–9.2
PCT (%)	0.2* ±0.04	0.2–2.0	0.8±12.0	0.3–1.9
WBC (total) (10^9/L)	6.9±1.5	6.7–7.0	7.3±1.7	7.1–7.5
Neutrophils (10^9/L)	3.8*±1.1	3.7–3.9	4.2±1.3	4.1–4.4
Lymphocytes (10^9/L)	2.3±0.6	2.2–2.4	2.3±0.6	2.3–2.4
Monocytes (10^9/L)	0.5±0.2	0.5–0.5	0.5±0.1	0.5–0.5
Eosinophils (10^9/L)	0.1±0.1	0.1–0.2	0.1±0.1	0.0–0.1
Basophils (10^9/L)	0.01±0.03	0.01–0.01	0.01±0.03	0.01–0.03
Fe (µg/dL)	110.4*±24.3	107.7–113.1	87.4±24.6	85.1–89.7
Vit B12 (ng/mL)	353.8±101.6	342.5–365.1	366.9±106.7	356.1–375.7

Notes: *For each parameter, significance differences between means for males and females (p<0.05) using independent T-test.

Abbreviations: CI, confidence interval; RBC, red blood cells; Hb, hemoglobin; Hct, hematocrit; MCV, mean cell volume; MCH, mean cell Hb; MCHC, mean cell Hb concentration; RDW, erythrocyte distribution width; MPV, mean platelet volume; PCT, plateletcrit; WBC, white blood cells; Fe, Iron; Vit B12, vitamin B12.

Table 2 Differences in the Reference Intervals Among Adult Males Classified by Age at 2.5 and 97.5 Percentiles

Parameters	RI 18–39 Years (N= 146)	RI 40–59 Years (N= 128)	RI 60–95 Years (N= 39)	p-value
WBC(103/dL)	4.4–10.6	4.2–10.4	4.4–8.8	0.596
Hb (g/dL)	13.6–17.4	13.3–17.0	13.0–17.0	0.017
Hct (%)	39.4–51.5	38.9–50.9	39.0–50.5	0.407
Plt (103/dL)	139.3–339.2	141.2–354.3	106–322.6	>0.001

Abbreviations: RI, reference interval; WBC, white blood cell; Hb, hemoglobin; Hct, hematocrit; Plt, platelet.

Table 3 Differences in the Reference Intervals Among Adult Females Classified by Age at 2.5 and 97.5 Percentiles

Parameters	RI 18–39 Years (N = 230)	RI 40–59 Years (N = 197)	RI 60–95 Years (N = 22)	p-value
WBC (103/dL)	4.6–11	4.2–10.5	4.4–10.9	0.287
Hb (g/dL)	11.9–15.5	11.8–15.9	12–15	0.310
Hct (%)	34.3–45.6	33.8–46.5	34.4–44.1	0.322
Plt(103/dL)	158–405.1	162–393.6	196–337	0.611

Abbreviations: RI, reference interval; WBC, white blood cell; Hb, hemoglobin; Hct, hematocrit; Plt, platelet.