BLOOD RETINOL AND BETA-CAROTENE LEVELS IN RURAL GUATEMALAN PRESCHOOL-CHILDREN

Plasma retinol and beta-carotene levels were measured in 502 preschool Guatemalan children from five rural hamlets. Their ages ranged from 6 to 78 months (mean: 42.9 +/- 19.2 months); 45% males and 55% females. The mean retinol value in the whole group was 0.9 +/- 0.4 mu mol/l (r ange: 0.1 to 8.4 mu mol/l). There was no significant difference betwee n sexes in retinol mean values nor in the incidence of retinol values less than 0.7 mu mol/l (22% in males, 18% in females). When grouped by age and community, significant low retinol mean values were found in two hamlets in the youngest age group (12 to 23 months) as compared to the other age-groups (p < 0.05). In the other two hamlets, there were no significant differences among retinol means by age-group. The high est prevalence of deficient retinol values by age-group was in the 12 to 23 months group (40%), and decreased as age increased. The mean val ue for beta-carotene in the whole group was 0.13 +/- 0.18 mu mol/l (ra nge: 0.01 to 2.23 mu mol/l). There were no significant differences in beta-carotene means between sexes in the whole group. Stratifying the beta-carotene data by age-groups and community, values were significan tly higher in the 48-59 months and 72-83 months groups, as compared wi th the other age groups in two of the communities (p < 0.05). Signific ant, differences across communities for beta-carotene were found only in the 12 to 23 months group.