151751-Najiba-Chargi

117 Surgery: skeletal muscle mass, systemic inflammation and flap reconstruction Table 1. Patient characteristics All patients N=600 SMM known N= 413 SMM known N=413 Without low SMM Low SMM NLR ≤ 3 NLR > 3 Characteristics Category n (%) n (%) n (%) p n (%) n (%) p Gender Male 374 (60.7) 168 (88.9) 79 (35.3) <0.01 83 (41.1) 83 (39.3) 0.8 Female 242 (39.3) 21 (11.1) 145 (64.7) 119 (58.9) 128 (60.7) Age (years) Median (IQR) 60.8 (51.6 - 69.5) 56.0 (12.4) 63.8 (12.0) <0.01 58.4 (12.5) 62.0 (12.7) <0.01 Flap used Radialis free forearm flap (RFFF) 276 (44.8) 95 (50.3) 104 (46.4) 0.2 110 (54.5) 89 (42.2) 0.1 Free Fibula flap (FFF) 164 (26.6) 42 (22.2) 54 (24.1) 43 (21.3) 53 (25.1) Anterolateral thigh flap (ALT) 66 (10.7) 26 (13.8) 20 (8.9) 17 (8.4) 29 (13.7) Scapula flap 61 (9.9) 12 (6.3) 27 (12.1) 16 (7.9) 23 (10.9) Others* 49 (8.0) 14 (7.4) 19 (8.5) 16 (7.9) 17 (8.1) Reason for reconstructive surgery Defect after ablative surgery 554 (89.9) 178 (94.2) 209 (93.3) 0.5 191 (94.6) 196 (92.9) 0.4 Trauma 4 (0.6) 2 (1.1) 0 1 (0.5) 1 (0.5) Osteoradionecrosis 25 (4.1) 3 (1.6) 6 (2.7) 2 (1.0) 7 (3.3) Secondary reconstruction 24 (3.9) 4 (2.1) 7 (3.1) 5 (2.5) 6 (2.8) Odontogenic tumor or cyst 9 (1.5) 2 (1.1) 2 (0.9) 3 (1.5) 1 (0.5) Histology Oncology cases Squamous cell carcinoma 509 (82.6) 157 (88.2) 195 (93.3) 0.1 174 (91.1) 178 (90.8) 0.9 Other 47 (7.6) 21 (11.8) 14 (6.7) 17 (8.9) 18 (9.2) TNM stage (for oncologic SCC patients) I 76 (12.3) 23 (13.2) 38 (18.8) 0.4 34 (18.2) 27 (14.3) 0.6 II 88 (14.3) 25 (14.4) 34 (16.8) 32 (17.1) 27 (14.3) III 62 (10.1) 22 (12.6) 20 (9.9) 19 (10.2) 23 (12.2) IV 314 (51.0) 104 (59.8) 110 (54.5) 102 (54.5) 112 (59.3) 7