Skip to main content

Table 2 The standard World Health Organization classifications of bone

From: Factors influencing the bone mineral density in Duroc boars

Classification

Criteria

SOS(m/s)1

Symbol

Strong bone

SOS > \(\overline{\mathrm{X}}\)+SD2

> 4442

+  + 

Normal bone

\(\overline{\mathrm{X}}\)-SD ≤ SOS ≤ \(\overline{\mathrm{X}}\)+SD

3982 ~ 4442

+ 

Osteopenia

\(\overline{\mathrm{X}}\)-2.5 × SD ≤ SOS < \(\overline{\mathrm{X}}\)-SD

3637 ~ 3982

−

Osteoporosis

SOS < \(\overline{\mathrm{X}}\)-2.5 × SD

< 3637

–

  1. 1SOS: speed of sound (m/s);
  2. 2\(\overline{\mathrm{X}}\): the mean value of SOS in metatarsal bone of experimental boars; SD: the standard deviation of SOS in metatarsal bone of experimental boars
Back to article page

Porcine Health Management

ISSN: 2055-5660

Contact us