Table 2.

Prevalence rates (PR per 1000) for β-thalassemia Trait and Sickle Cell Trait in Saudi Arabia form 2011 to 2015.

	Population screened	Β-thalassemia Trait			Sickle Cell Trait
Year	12,30,582	Positive test	PR*	95% Confidence Interval	Positive test	PR	95% Confidence Interval
2011	78,072	1892	24.2	23.2–25.3	3304	42.3	41.0–43.8
2012	2,58,581	4557	17.7	17.1–18.2	13,055	50.5	49.7–51.3
2013	2,68,097	2837	10.6	10.2–11.0	13,406	50.0	49.2–50.8
2014	2,76,236	2666	9.7	9.3–10.0	13,490	48.9	48.0–49.7
2015	3,05,871	3657	12.0	11.6–12.4	15,307	50.0	49.3–50.8

[2] Incebiyik A, Genc A, Hilali NG, Camuzcuoglu A, Camuzcuoglu H, Kilic A, Vural M. Prevalence of beta-thalassemia trait and abnormal hemoglobins in Sanliurfa Province in southeast Turkey. Hemoglobin 2014;38(6):402–404. doi: 10.3109/03630269.2014.978008. PubMed PMID: 25405917.

^*p-value <0.0001 for comparisons of PRs for β-thalassemia carrier by year [2].