These measurements should include at least chest width at nipple level, chest depth at that level, bitrochanteric width, wrist girth, and ankle girth, the most essential determinants of weight with about 15% fat for males and 22% fat for females and normal muscle mass.
Why not study a subset with DXA or CT measurements of body composition; bone, muscle, fat mass and volume?
Making DXA, CT, and/or the traditional densitometry measurements for body composition does have its own usefulness and could be studied in a subset. However, the body build measurements supply a standard for weight during adulthood and need not be repeated once final adult size is reached;they are far less costly than DXA or CT or densitometry. A weight standard based on skeletal size and height assessment is far superior to one based on stature alone. To evaluate current weight in terms of current fat or muscle excesses/surpluses, I can suggest further refinements in anthropometric measurements, derived from our research, which I could send you.