Fig. 3
From: Obesity negatively impacts corneal nerves in patients with diabetes mellitus
Subgroup analysis of corneal nerve parameters across different body mass index (BMI) categories combined. Bar charts showing the comparisons of corneal nerve parameters across various BMI categories: (a) corneal nerve fiber density (CNFD, number of fibers/mm2), (b) corneal nerve fiber length (CNFL, total length of fibers mm/mm2), (c) corneal nerve branch density (CNBD, number of branch points on main fibers/mm2), (d) corneal nerve total branch density (CTBD, number of branch points on main fibers/mm2). The y-axis represents the mean values of each corneal nerve parameter, while the x-axis displays different BMI (kg/m2) categories: (1) underweight (BMI < 18.5) + normal (18.5 ≤ BMI < 25); (2) overweight (25 ≤ BMI < 30) + class I obesity (30 ≤ BMI < 35); (3) class II obesity (35 ≤ BMI < 40) + class III obesity (BMI > 40). *, P < 0.05, **, P < 0.005, ***, P < 0.0001