Table 1.

Estimated dates of decline for EB, the CUSA, and SA using gap and binning analysis methods

Region	Gap analysis		Binning analysis
	Best fit age (yr BP)	95% CI (yr BP)	Median age (yr BP)	Bin range (yr BP)
EB	14,661	13,613–19,958	14,714	14,440–14,988
CUSA	13,001	12,861–13,232	13,473	12,819–14,127
SA	12,967	12,595–13,921	13,480	12,021–14,939