Table 4.

FRE by variable (mm).

	n	Mean	SD	p
By Standard Method
Number of markers
$\le 4$	25	1.98	1.27	0.431
$>4$	10	2.46	2.03
Tumor distance from chest wall
$>0\hspace{0.17em}\text{cm}$	12	1.92	1.19	0.685
0 cm	23	2.13	1.68
Time elapsed between scans
$\le \hspace{0.17em}8\hspace{0.17em}\text{days}$	21	1.72	1.05	0.161
$>8\hspace{0.17em}\text{days}$	14	2.56	1.97
By Outlier Identification
Number of markers
$\le 4$	15	1.90	1.27	0.368
$>4$	10	2.46	2.03
Tumor distance from chest wall
$>0\hspace{0.17em}\text{cm}$	9	2.13	1.29	0.932
0 cm	16	2.12	1.80
Time elapsed between scans
$\le \hspace{0.17em}8\hspace{0.17em}\text{days}$	15	1.71	1.00	0.250
$>8$	10	2.75	2.14