Table 3.

Prevalence rate for β-thalassemia and Sickle Cell disorders by region, in Saudi Arabia, 2011–2015.

β-thalassemia						Sickle Cell Disorder
Regions	Population	Trait	95%CI	Disease*	95%CI	Carrier	95%CI	Disease*	95%CI
Al-Baha	29,161	13.2	11.9–14.6	0.3	0.2–0.6	34.9	32.8–37.0	2.8	2.2–3.5
Al-Jouf	29,339	2.9	2.3–3.5	0.3	0.1–0.5	2.6	2.0–3.2	1	0.7–1.4
Asir	1,65,316	6.7	6.3–7.1	0.2	0.1–0.2	42.5	41.5–43.4	7	6.6–7.4
Eastern Region	2,11,727	23.7	23.1–24.4	0.4	0.3–0.5	114.4	113.0–115.8	9.8	9.4–10.2
Hail	38,567	3.3	2.8–3.9	0.00	0.0–0.1	2.0	1.6–2.5	0.1	0.0–0.2
Jazan	72,420	32.1	30.8–33.4	0.6	0.5–0.8	135.7	133.2–138.2	6.8	6.2–7.4
Makkah	2,38,978	14.4	13.9–14.9	1.9	1.7–2.1	31.3	30.6–32	1.9	1.7–2.1
Maddinah	81,286	8.1	7.55–8.79	0.2	0.1–0.3	13.7	13–14.6	0.8	0.6–0.9
Najran	24,836	2.4	1.9–3.1	0.00	0.0–0.2	12.6	11.3–14.1	0.3	0.2–0.6
North Border	22,260	7.6	6.5–8.8	3.4	2.7–4.3	4.0	3.3–5	0.4	0.2–0.8
Qasim	70,057	4.0	3.6–4.5	0.4	0.3–0.6	2.5	2.2–2.9	0.3	0.2–0.5
Riyadh	2,00,652	7	6.6–7.4	0.2	0.2–0.3	18.1	17.6–18.7	1.1	0.9–1.2
Tabouk	45,983	6.3	5.6–7.1	0.2	0.1–0.4	27.5	26.0–29.0	1.0	0.8–1.4

95%CI = 95% confident interval.

[3] Memish ZA, Owaidah TM, Saeedi MY. Marked regional variations in the prevalence of sickle cell disease and beta-thalassemia in Saudi Arabia: findings from the premarital screening and genetic counseling program. J Epidemiol Global Health 2011;1(1):61–68. doi: 10.1016/j.jegh.2011.06.002. PubMed PMID: 23856375.

^*Significant presentation among the B-thalassemia and Sickle cell disease p-value = 0.0001 [3].