Table 2: Distribution of subjects according to cortical shape and their mean age and mean cortical width.

		BMD of lumbar spine			BMD of femural neck			Mean age	Mean cortical width(mm)
Cortical shape	number	normal	osteopenic	osteoporotic	normal	osteopenic	osteoporotic
normal	54	43(79.6%)	4(7.4%)	7(13.7%)	44(81.5%)	7(13%)	3(5.6%)	51.19	4.37
Moderately eroded	51	17(33.3%)	8(15.7%)	26(51%)	18(35.3%)	18(35.3%)	15(29.4%)	57.66	3.81
Severe eroded	14	2(14.3%)	4(28.6%0	8(57.1%)	3(21.4%)	7(50.7%)	4(28.6%)	62.64	2.41