Table 2. Demographic characteristics of the study participants.

Variables	Patients with SCD n (%)	HbAA controls n (%)	p-value
Gender			0.628*
Male	23 (39.7)	51 (44.0)
Female	35 (60.3)	65 (56.0)
Mean age, mean ± SD, years	25.0 ± 8.1	24.0 ± 4.0	0.195§
Age group, years			0.005*
≥ 30	15 (25.9)	10 (9)
< 30	43 (74.1)	106 (91)
Education level			< 0.010*
Secondary	14 (24.1)	0 (0.0)
Tertiary	44 (75.9)	116 (100)
Marital status			0.183*
Single	52 (98.7)	111 (95.7)
Married	6 (10.3)	5 (4.3)

*Fisher’s exact probability test

^§Mann-Whitney U test

Mann-Whitney U (Z) = 2959.000

SCD: sickle cell disease; SD: standard deviation; HbAA: hemoglobin AA.