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Abstract
Objectives: We investigated sarcopenia prevalence using various diagnostic criteria based on dual-energy X-ray absorptiometry (DXA) and computed tomography (CT) in gastric cancer patients who underwent gastrectomy, and evaluated the association between sarcopenia and perioperative complications.

Methods: This retrospective study included consecutive patients with gastric cancer who underwent gastrectomy, and preoperative DXA and CT from January 2013 to November 2020. Body composition was measured using DXA and CT. Height-adjusted DXA-based Appendicular Skeletal Muscle Mass Index (ASMI) and CT-based skeletal muscle cross-sectional area at the L3 level (SMI) were measured. Sarcopenia and sarcopenic obesity were defined using reported cutoff values. The chi-square test and univariate analysis were performed to determine risk factors for significant and severe perioperative complications (Clavien-Dindo Grades ≥ 2 and ≥ 3, respectively).

Results: In total, 77 males and 43 females aged 61.4 ± 11.0 years were included. ASMI and SMI were correlated (r = 0.819), but sarcopenia prevalence varied (20.0-63.3%), depending on the criteria applied. Univariate analysis revealed sarcopenia defined using the Asian Working Group on Sarcopenia (AWGS) criteria and sarcopenic obesity as risk factors for significant (odds ratio [OR] 2.76, p = 0.030 vs. OR 4.31, p = 0.002) and severe perioperative complications (OR 3.77, p = 0.036 vs. OR 4.78, p = 0.010). In subgroup analyses, sarcopenia and sarcopenic obesity were significantly associated with perioperative complications only in males.

Conclusion: Perioperative complication risk can be predicted from sarcopenia defined using the AWGS criteria and sarcopenic obesity measured using DXA and CT, particularly in males.

Key points: • The prevalence of sarcopenia varies due to definition differences. • Sarcopenia and sarcopenic obesity are risk factors for significant and severe perioperative complications, particularly in males. • Our results suggest that physicians need to pay attention to perioperative complications after surgical treatment of male patients with sarcopenia and sarcopenic obesity.

Affiliations

Mimi Kim 1, Chul-Min Lee 1, Bo Kyeong Kang 1, Tae Kyung Ha 2, Yun Young Choi 3, Soo Jin Lee 4
1Department of Radiology, Hanyang University Medical Center, 222-1 Wangsimni-Ro, Seongdong-Gu, Seoul, 04763, Republic of Korea.
2Department of Surgery, Hanyang University Medical Center, 222-1 Wangsimni-Ro, Seongdong-Gu, Seoul, 04763, Republic of Korea.
3Department of Nuclear Medicine, Hanyang University Medical Center, 222-1 Wangsimni-Ro, Seongdong-Gu, Seoul, 04763, Republic of Korea.
4Department of Nuclear Medicine, Hanyang University Medical Center, 222-1 Wangsimni-Ro, Seongdong-Gu, Seoul, 04763, Republic of Korea. suji76@hanmail.net.