Table 3.

Comparison of the abundance of AuNPs in the urothelium of control and BBN-treated bladders

Week	Group	Mean level of AuNP	Standard error	p-value of Student’s t-test (vs control)
Week 17	Control	2.373	0.066	–
	BBN group 1	1.591	0.079	<0.001*
	BBN group 2	0.761	0.068	<0.001*
Week 20	Control	2.007	0.072	–
	BBN group	0.874	0.082	<0.001*
Week 22	Control	1.565	0.109	–
	BBN group	0.375	0.064	<0.001*

^*Note: Significant.

Abbreviations: AuNP, gold nanoparticle; BBN, N-butyl-N-(4-hydroxybutyl)nitrosamine.