Table 2. Plasma Retinol Levels in Patients and Controls

Group	n	Mean (± SEM) Plasma Retinol Level, μg/dL	Plasma Retinol Range, μg/dL
Children with HbSS	40	57.1 ± 4.7	6-116
Children with HbSC	11	60.9 ± 5.7	39-87
Children with HbSβ^thal	8	55.5 ± 12.8	4.6-109
Children in the control group	14	59.0 ± 5.88	28.7-119
Laboratory employees	7	70.0 ± 17.39	43.0-162
All patients	59	57.6 ± 3.7	4.6-116
All controls	21	62 ± 6.5	28.7-162

Note: No significant differences were observed between patients and the combined controls and/or by hemoglobin genotype.