Table 1.

Correlation of break area and the number of test points below threshold.

threshold	Spearman’s ρ	p	95% CI		n
<24dB	0.807	<0.0001	0.701	0.878	65
<20dB	0.843	<0.0001	0.755	0.902	65
<16dB	0.825	<0.0001	0.728	0.890	65
<12dB	0.725	<0.0001	0.584	0.823	65
<8dB	0.718	<0.0001	0.574	0.818	65
<4dB	0.671	<0.0001	0.510	0.786	65