Fig. 4From: Gender-specific differences in hypothalamus–pituitary–adrenal axis activity during childhood: a systematic review and meta-analysisForest plots of gender differences per subgroup. a 24-h urine cortisol (μg/24 h) <8 years of age. b 24-h urine cortisol (μg/24 h) 8–18 years of ageBack to article page