“…Subjects were investigated according to a protocol covering the following domains: social and environmental aspects; smoking history; pharmacological therapy, which was assessed and codified according to a previously validated method (22,23); comorbid diseases, which were classified following the International Disease Classification, 9 th revision, Clinical Modification, and combined to compute Charlson's Index of comorbidity (24,25); anthropometric data [(weight, height, Body Mass Index (BMI=weight/height 2 )]; waist-to-hip ratio, and occiput-wall distance (26)(27)(28). The last index reflects the degree of kyphosis of the upper thoracic and cervical spine, which is a correlate of both poor balance and osteoporotic vertebral fractures (26,27).…”