Talk:Sagittal abdominal diameter

This definition is inadequate for anyone trying to measure their SAD. Can anyone do better. In view of NYTimes and other reports of the correlation of a high SAD with Alzheimers, this issue is of general interest.

The supine abdominal height method of measuring SAD, now described in main article, allows simple self measurement.LoopTel (talk) 00:57, 21 February 2009 (UTC)

Definition of SAD
Currently, SAD is defined thus, SAD is the distance from the small of the back to the upper abdomen at the point midway between the top of the pelvis and the bottom of the ribs, measured while standing.

Only in the first study cited was SAD measured in the standing position and at the point midway between the top of the pelvis and the bottom of the ribs. This generalisation from just one study is unwarranted especially when in at least one of the other studies cited here SAD was measured in the supine position and at the highest point between the iliac crests or in a variety of locations.

SAD is often measured while supine using a specialised caliper such as the Holtain-Kahn Abdominal Caliper (Snijder et al (July 2002)). For a further example, currently the second reference in the wiki article is itself to a study by Petersson et al in 2007 where SAD was measured in supine patients.

Second, it would seem from a brief survey of the literature that there is no agreement amongst all researchers exactly where SAD ought to be measured. In the study by Snijder et al, the upper blade of the calliper was lowered to a mark midway between the iliac crests.

In another study by HA de Almeida Paula et al, the researchers measured SAD at four different locations between the lowest rib and the iliac crests, at: (i) the midpoint between the iliac crests; (ii) umbilical level; (iii) higher abdominal diameter; and (iv) the narrowest point between the last rib and the iliac crest.

I'm amending the sentence, therefore, to read as follows: SAD is the distance from the small of the back to the upper abdomen, measured while standing or supine at a point between the lowest rib and the iliac crests.--124.186.221.219 (talk) 14:41, 21 October 2012 (UTC)

Amended sentence to read as follows: ''SAD is the distance from the small of the back to the upper abdomen. SAD may be measured when standing[1] or supine.[2] SAD may be measured at any point from the narrowest point between the last rib and the iliac crests to the mid-point of the iliac crests.[1][2][3]''--124.186.221.219 (talk) 15:46, 21 October 2012 (UTC)