Phase angle as a prognostic indicator of surgical outcomes in patients with gastrointestinal cancer

Characteristics	All patients	Patients with no complications (G0)	Patients with complications (G1–G5)	p-value
Gender
Male	50 (71 %)
Female	20 (29 %)
Age (years)^a	65.0 (10.7) [62.4–67.6]	61.7 (9.8) [56.9–66.6]	66.1 (10.9) [63.1–69.2]	0.137
Phase Angle (°)^a	5.23 (2.77) [5.0–5.5]	5.64 (0.72) [5.3–6.0]	5.09 (0.98) [4.8–5.4]	0.036*
Location of the primary tumor (%)
Colon	17 (24,3)	4 (22.2)	13 (25.0)
Rectosigmoid	2 (2,9)	1 (5.5)	1 (1.9)
Rectum	45 (64,3)	11 (61.1)	34 (65.4)
Anus	1 (1,4)	1 (5.5)	0 (0)
Breast	1 (1,4)	0 (0)	1 (1.9)
Ovary	4 (5,7)	1 (5.5)	3 (5.8)

a Arithmetic mean (standard deviation) [confidence interval].

* Statistically significant p-value

TABLE 2.

Mean age and mean phase angle in each Clavien Dindo grade

	Number of patients (%)	Age (years) ^a	Phase angle (°)^a
Grade 0	18 (26)	61.7 [56.9–66.6]	5.64 [5.28–6.00]
Grade I	5 (7)	56.0 [50.2–61.8]	6.22 [5.64–6.80]
Grade II	38 (54)	67.1 [63.4–70.7]	4.99 [4.67–5.31]
Grade III	4 (6)	62.2 [45.0–79.5]	5.15 [3.41–6.88]
Grade IV	5 (7)	72.2 [60.5–83.9]	4.64 [3.77–5.51]
Grade V	0 (0)

a Arithmetic mean (standard deviation) [95% confidence interval].

TABLE 3.

Odds for developing a complication and probabilities of developing a complication at different values of phase angle

Phase Angle (°)	Odds of a complication	Probability of a complication (%)
4.5	5.532	84.7
5.0	3.831	79.3
5.5	2.651	72.6
6.0	1.837	64.8

TABLE 4.

Contingency Table with the sensitivity and a specificity of the phase angle

	Phase angle < 5,5	Phase angle ≥ 5,5
Complication	33 (true positive)	19 (false negative)	52
No complication	7 (false positive)	11 (true negative)	18
	40	30

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DOI: https://doi.org/10.2478/raon-2023-0060 | Journal eISSN: 1581-3207 | Journal ISSN: 1318-2099

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Language: English

Page range: 524 - 529

Submitted on: Aug 3, 2023

Accepted on: Sep 30, 2023

Published on: Nov 30, 2023

Published by: Association of Radiology and Oncology

In partnership with: Paradigm Publishing Services

Publication frequency: 4 issues per year

Keywords:

phase angle,

colorectal cancer,

postoperative complications,

Related subjects:

© 2023 Jana Gulin, Ester Ipavic, Denis Mlakar Mastnak, Erik Brecelj, Ibrahim Edhemovic, Nada Rotovnik Kozjek, published by Association of Radiology and Oncology
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 57 (2023): Issue 4 (December 2023)

Phase angle as a prognostic indicator of surgical outcomes in patients with gastrointestinal cancer

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TABLE 2.

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TABLE 3.

TABLE 4.

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