151751-Najiba-Chargi

82 CHAPTER 5 Legend: BMI: body mass index, CSMI: cervical skeletal muscle mass index DISTRIBUTION OF SMM The median SMA at the level of C3 was 39.0 cm 2 for men (IQR 28.4-49.6 cm 2 ) and 27.8 cm 2 for women (19.2-36.2 cm 2 ). The median CSMI was 12.3 cm 2 /m 2 for men (IQR 8.9-15.7 cm 2 /m 2 ) and 10.0 cm/m 2 for women (IQR 6.9-13.1 cm 2 /m 2 ). The distribution of SMA at the level of C3 and from the 5 th percentile up to the 95 th percentile is shown in Table 2. Table 2. Distribution of SMM from the 5th until the 95th percentile SMA at the level of C3 (cm 2 ) CSMI (cm 2 /m 2 ) Male N = 988 Female N = 427 Male N = 988 Female N = 427 Total mean (SD) 39.4 (8.3) 28.6 (6.8) 12.6 (2.7) 10.3 (2.4) P5 26.9 19.1 8.4 7.0 P10 29.4 20.9 9.4 7.5 P25 33.6 24.0 10.8 8.6 P50 39.0 27.8 12.3 10.0 P75 44.2 32.4 14.2 11.7 P90 49.6 36.6 16.0 13.5 P95 53.7 40.1 17.2 14.8 Legend: SD: standard deviation, SMA: skeletal muscle mass area, CSMI: cervical skeletal muscle mass index, P: percentile, N: number of patients