Fig. 1From: Sickle cell trait in São Tomé e Príncipe: a population-based prevalence study in women of reproductive agePrevalence ratios for associations of age, dialect and relative with SCD with having SCT. PR– Prevalence Ratio. CI– Confidence Interval. Descendant - son or daughter; Ascendant 1 - father, mother, sibling or nephew; Ascendant 2 - grandparent or first-degree uncle, aunt or cousin. Reference classes are presented as PR of 1.Back to article page