Differentiates collagen bone disease (skeletal dysplasia) from primary spine (e.g. Scoliosis)
III. Technique: Measurement
See Sitting Height for an alternative method of calculating segment heights
Lower segment: Top of pubic symphysis to floor
Upper segment: Top of head to top of pubic symphysis
Calculation: TotalHeight - LowerSegmentHeight
IV. Interpretation: Normal upper to lower ratio
Birth upper to lower ratio: 1.70 (Greatest ratio)
Postpuberty upper to lower ratio: 0.89 - 0.95
Images: Related links to external sites (from Bing)
These images are a random sampling from a Bing search on the term "Upper to Lower Segment Ratio." Click on the image (or right click) to open the source website in a new browser window. Search Bing for all related images
FPnotebook.com is a rapid access, point-of-care medical reference for primary care and emergency clinicians. Started in 1995, this collection now contains 6531 interlinked topic pages divided into a tree of 31 specialty books and 722 chapters. Content is updated monthly with systematic literature reviews and conferences.
Although access to this website is not restricted, the information found here is intended for use by medical providers. Patients should address specific medical concerns with their physicians.
This page was written by Scott Moses, MD, last revised on 10/31/2008 and last published on 12/6/2017.