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. 2012 Dec 24;2012:870306. doi: 10.1155/2012/870306

Table 2.

Effect of different factors on the Similarity of Positioning Score (SiPS).

SiPS-ida (n = 52) SiPS-diffa (n = 45) P value
Index-tumor size (mean ± SD)b 14.1 mm (1.9) 13.6 mm (1.8) 0.773
RFA approachc
 Open RFA (n = 63) 37 (59%) 26 (41%) 0.203
 CT-targeted RFA (n = 34) 15 (44%) 19 (56%)
Partial hepatectomy during RFAc
 Yes (n = 43) 24 (56%) 19 (44%) 0.838
 No (n = 54) 28 (52%) 26 (48%)
No. of tumours ablatedc
 1-2 (n = 70) 40 (57%) 30 (43%) 0.364
 ≥3 (n = 27) 12 (44%) 15 (56%)
Localizationc
 Subcapsular (n = 76) 44 (58 %) 32 (42 %) 0.140
 Central (n = 21) 8 (38 %) 13 (62 %)

aSiPS: Similarity of Positioning Score, identical (SiPS-id) or different (SiPS-diff).

bStudent's t-test.

cChi-square or Fisher's exact test.