Table 2:
Wilcoxon analysis (
P
values)
Energy (keV)
66 keV
70 keV
77 keV
86 keV
66
x
.001
a
.001
a
.001
a
70
.001
a
x
.001
a
.001
a
77
.001
a
.001
a
x
.001
a
86
.001
a
.001
a
.001
a
x
Note:
—x indicates not calculable.
↵
a
Statistically significant
P
value.