Postural stability in non-insulin dependent diabetics

Postural stability in 55 non-insulin dependent diabetics was compared with 53 non-diabetic controls matched for age and gender. The study was conducted in a primary care clinic, using a computerised postural sway system. Changes in the centre of pressure while the subjects stood on a force platform were recorded, and sway parameters computed using customised software. Clinical data were obtained by interview, physical examination, and from case records. Results of the study showed that non-insulin dependent diabetics were more unstable than the non-diabetic controls for four out of the six parameters studied (namely L, length of sway path; Vel, average speed of centre of pressure along its path; Ao, area included within the path of the centre of pressure; and Ae, 95% confidence elliptical area), after adjusting for height, weight, adequate sleep and alcohol intake the night before, and history of bone or thyroid disorders. Amongst diabetic subjects, significant factors associated with postural stability were age, weight, presence of peripheral neuropathy or cataract, metformin, use, and HbAlc levels > 9%. Further studies are indicated to look into factors affecting postural stability (other than diabetic neuropathy) in greater depth.