Urinary bisphenol A and pubertal development in Chinese school-aged girls: a cross-sectional study

Table 5 Urine BPA Level in Relation to Breast Development

Age(years)	BPA level	N	%	Adjusted PR^a
Breast Stage 2 or higher
9–11
	<LOD	107	85.1	1(ref)
	LOD-median	69	94.2	0.99 (0.89, 1.10)
	>median	66	86.4	0.91 (0.80, 1.04)
Breast Stage 5
13–18
	<LOD	130	51.5	1(ref)
	LOD-median	106	34.0	0.85 (0.62 1.15)
	>median	96	43.8	0.85 (0.63, 1.15)

^aAdjusted for age, BMI, household income, sleep quality, sports activity, unbalanced diet, and depression score

ISSN: 1476-069X