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. Author manuscript; available in PMC: 2014 Jul 9.
Published in final edited form as: JAMA Surg. 2013 Jul;148(7):597–601. doi: 10.1001/jamasurg.2013.1431

Table 1.

Characteristics of patients included in this study

Bilateral Resection
N = 141
Ablation ± Resection
N = 95
p

Female (%) 62 (47) 41 (43) 0.534

Age [median (IQ Range)] 61.4 (53.6-69.2) 63.0 (53.6-71.0) 0.432

Primary in Colon (%) 94 (70) 78 (82) 0.032

Simultaneous colorectal resection (%) 6 (4) 22 (23) <0.001

Primary Nodal Status (%) 0.246
 N0 43 (31) 40 (42)
 N1 62 (45) 36 (38)
 N2 32 (23) 19 (20)

Disease Free Interval (Months)
[median (IQ Range)]
8.9 (2.4-19.9) 0 (0-0) <0.001

CEA (ng/mL)
[median (IQ Range)]
29.2 (7.9-166.3) 7.9 (2.9-28.3) <0.001

Number of Tumors
[median (IQ Range)]
4.0 (2.0-5.0) 3.0 (2.0-4.0) 0.005

Size of Largest Tumor (cm)
[median (IQ Range)]
4.1 (2.5-6.0) 2.3 (1.5-3.6) <0.001

Clinical Risk Score (CRS) > 2 (%) 42 (31) 46 (51) 0.003

Ablation alone N/A 9 (9) N/A
Ablation + Resection 86 (91)

Radiofrequency Ablation N/A 88 (91) N/A
Microwave Ablation 9 (9)