Table 2.

Differences in threshold versus pulse rate function slopes for pulse rates below 1000 pps versus those above 1000 pps and results of corresponding t-tests.

		T levels				C levels
	difference (dB/dblg)	t	n	p	difference (dB/dblg)	t	n	p
Basal	1.24	5.57	17	< 0.001	0.65	4.00	15	0.001
Middle	1.07	4.63	17	< 0.001	0.54	3.47	16	0.003
Apical	1.17	3.69	17	0.001	1.19	6.78	14	< 0.001