Adrenal Insufficiency after Steroid Therapy in Children with Steroid-Sensitive Nephrotic Syndrome: A Cross-sectional Study.

INTRODUCTION

Glucocorticoid-induced adrenal insufficiency (AI) is underestimated and under-reported in children with nephrotic syndrome (NS). This study aimed to estimate the prevalence of AI in children with steroid-sensitive NS, defined by serum cortisol level <18 mcg/dL 30 minutes after low-dose adrenocorticotropin stimulation test (LDST) and/or baseline (8 AM) serum cortisol level <5 mcg/dL, 4-12 weeks after stopping steroid therapy.

METHODS

In this cross-sectional study, 73 children with steroid-sensitive NS, in remission and off steroids for 4-12 weeks, were enrolled from the Paediatrics Department at a tertiary care hospital. Baseline (8 AM) serum cortisol was measured, and LDST was done using 1 mcg tetracosactide acetate intravenously. The proportion of AI was calculated. Clinical features of AI and steroid toxicity were noted, and the association between the two was analysed.

RESULTS

Out of 73 children (45 males), 52 (71.2%, 95% confidence interval: 59.3%-80.9%) had AI as defined by serum cortisol level <18 mcg/dL 30 min after LDST and/or baseline (8 AM) serum cortisol level <5 mcg/dL at 4-12 weeks after completion of steroid therapy. A strong positive correlation was observed between 8 AM baseline serum cortisol levels and post-LDST serum cortisol levels. Children exhibiting features of steroid toxicity, such as cushingoid facies, had 4.96 times higher odds of having AI.

CONCLUSION

There remains a high risk of AI even 4-12 weeks after completion of alternate-day steroid therapy in children with NS. Clinical features of steroid toxicity may serve as useful predictors of AI.