Microalbuminuria and its association with adverse pregnancy outcome in a tertiary health centre in Nigeria.

Background: Adverse pregnancy outcomes occur more commonly in developing countries and are still prevalent in our sub-region. Microalbuminuria is a marker of endothelial dysfunction and has been proposed as an aetiological factor in the development of some adverse pregnancy outcomes such as pre-eclampsia, intrauterine growth restriction (IUGR) and pre-term labour.

Aim: The aim is to determine the prevalence of microalbuminuria and its association with adverse pregnancy outcomes.

Methods: This was a prospective cross-sectional study with follow-up amongst women in early pregnancy presenting at Usmanu Danfodiyo University Teaching Hospital, Sokoto. Three hundred and thirty women with singleton pregnancy at gestational age <20 weeks, blood pressure <140/90 mmHg, normal fasting blood sugar and normal renal function were recruited. Those with a history of hypertension, diabetes mellitus, chronic kidney disease, sickle cell anaemia were excluded, multiple pregnancies, urinary tract infection or positive dipstick proteinuria at first contact were excluded. They were recruited consecutively and a structured interviewer-administered questionnaire was completed. Single-spot urine analysis for albumin was performed. The women were followed up to the time of delivery and the puerperium and any adverse outcome were documented.

Results: The prevalence of microalbuminuria was 58.4%. The maternal and foetal adverse outcomes such as hypertensive disorders of pregnancy, pre-mature rupture of membrane, IUGR, preterm birth and stillbirth occurred more amongst the women with microalbuminuria. However, there was no statistically significant association between microalbuminuria and having these adverse outcomes (P > 0.05).

Conclusion: There was a high prevalence of microalbuminuria amongst healthy pregnant women and pregnancy complications occurred more frequently in women with microalbuminuria than in those without. However, this association was not sufficient to predict adverse outcomes in pregnancy.