A community based study of vitamin A and vitamin E status of adolescent girls living in the Shire Valley, Southern Malawi.

OBJECTIVE

To assess vitamin A and E status and anaemia in non-pregnant Malawian adolescent girls.

DESIGN

A cross-sectional study in rural village communities in the Shire Valley, Southern Malawi.

SUBJECTS

Adolescent girls, n = 118, aged between 10 and 19 y, 112 of whom were unmarried.

METHODS

Socio-demographic information was collected by questionnaire, heights and weights were measured. Vitamin A was assessed by the Modified Relative Dose Response (MRDR) test, in addition to serum retinol values. Blood samples were collected 4-5 h after administration of 3,4-didehydroretinyl acetate. Retinol and alpha-tocopherol levels were measured by HPLC. Serum retinol results for non-pregnant girls were compared with values for 43 adolescent pregnant girls which were available from a previous study.

RESULTS

26.6% of non-pregnant girls had serum retinol values < 0.70 micromol/L; 40.2% had an MRDR ratio > 0.060. In 59.3%, serum tocopherol levels were < 11.5 micromol/L and the tocopherol/cholesterol ratio was < 2.2 in 23.9%. 11.3% had a haemoglobin > or = 12 g/dl. Vitamin A levels were significantly related to age, and younger girls were more likely to be deficient. Significant correlations were found between serum retinol, MRDR values and serum tocopherol. Girls with a low body mass index for age had tocopherol cholesterol ratios < 2.2. Low serum retinol values occurred significantly more often in stunted girls (P=0.01). Serum retinol values of adolescent pregnant girls were significantly lower than those of non-pregnant adolescents (P=0.002).

CONCLUSIONS

Vitamin A and E deficiency and anaemia were common in adolescent non-pregnant girls, and thought to partly result from increased growth requirements. Girls who become pregnant at an early age are at risk of depletion of their nutritional reserves. Measures to reduce nutritional deficiencies before the first pregnancy are needed.