Table 4.

AUC values for each of the four density intervals and AUC differences ($\mathrm{\Delta }\mathrm{AUC}$) between each pair of intervals. For visualization purposes, the comparisons between int 1 versus int 3 and int 4 versus int 3 are not shown, although they present AUC differences of 0.03 (95% $\mathrm{CI}=-0.05$ to 0.11) and 0.001 (95% $\mathrm{CI}=-0.11$ to 0.10), respectively, with $P>0.05$ for both. The $P$-value higher than 0.05 indicates that there are no statistically significant differences between intervals.

Interval	PDV range (%)	AUC	CI (95%)	Intervals	$\mathrm{\Delta }\mathrm{AUC}$	CI (95%)	$P$
1	4.55 to 8.11	0.93	0.88 to 0.97	Int 2 versus Int 1	0.03	$-0.03$ to 0.07	0.50
2	8.11 to 10.15	0.96	0.91 to 0.99	Int 2 versus Int 4	0.05	$-0.03$ to 0.16	0.48
3	10.15 to 13.55	0.90	0.84 to 0.96	Int 2 versus Int 3	0.06	$-0.02$ to 0.14	0.49
4	13.55 to 44.22	0.91	0.81 to 0.98	Int 1 versus Int 4	0.02	$-0.07$ to 0.13	0.48

^aAbbreviations: $\mathrm{\Delta }\mathrm{AUC}$, difference between AUC for each interval.