Table 3 Red cell distribution width and populations, gender, age and Hb phenotypes

Study groups

14.5 (2.7)

20.7 (8.3)

 < 0.0001

Gender

Male

17.1(8.0)

0.317

14.55 (1.9)

0.089

21.2 (7.50)

0.056

Female

15.5(6.7)

14.2 (2.4)

20.1 (8.80)

Age

 ≤ 5 Years

19.0 (7.1)

0.001

15.95 (4.2)

0.001

21.2 (7.10)

0.138

6–12 years

15.5(8.2)

14.2 (1.7)

19.9 (7.90)

 ≤ 5 Years

19.0 (7.1)

 < 0.0001

15.95 (4.2)

 < 0.0001

21.2 (7.10)

 < 0.0001

 ≥ 13 Years

14.1 (2.8)

13.7 (1.8)

16.5 (2.75)

6–12 Years

15.5(8.2)

 < 0.0001

14.2 (1.7)

0.347

19.9 (7.90)

0.225

 ≥ 13 Years

14.1 (2.8)

13.70 (1.8)

16.5 (2.75)

Hb Phenotypes

Hb AA

14.5 (2.7)

Hb SS

25.4 (5.5)

 < 0.0001

Hb SS + Hemoglobin F

20.9 (5.5)

 < 0.0001

Hb SS + Beta Thalassemia

23.3 (7.9)

 < 0.0001

Hb AS

16.4 (6.5)

 < 0.0001

Hb AS + Hemoglobin F

24.2 (7.4)

0.449

Hb AS + Beta Thalassemia

21.0 (10.5)

0.791

Beta Thalassemia

18.1 (8.3)

1.00