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Distances from the skin to the rhomboid major muscle (SM), skin to the rib (SB), the thickness of rhomboid major muscle (the difference between SM and SB), and the safe margin of needle depth in each group according to BMI
Values are presented as mean±standard deviation.
BMI, body mass index; NA, not available.
a)BMI<23, b)23≤BMI<25, c)BMI≥25, and d)defined as a range between mean+1 SD of SM and mean-1 SD of SB.
