From: Sickle cell trait in São Tomé e Príncipe: a population-based prevalence study in women of reproductive age
Genotype
N
Prevalence (Sample)
Prevalence (Weighted, 95% CI)
HbAA
301
80.05%
77.20% (68.30–85.00)
HbAS
49
13.03%
13.45% (9.05-19.00)
HbAC
18
4.79%
6.79% (3.77-11.00)
HbSS
2
0.53%
1.38% (0.25-4.00)
HbSC
6
1.60%
1.20% (0.31-3.00)