Table 1: Involvement of number of anatomical regions and the prevalence.

Number of anatomical regions involved

Prevalence

No involvement of any anatomical region

26.4

One region

15.2

Two regions

20.3

Three regions

10.8

Four regions

7.8

Five regions

8.2

Six regions

4.8

Seven regions

2.6

Eight regions

0.9

Nine regions

3.0

Involvement of any anatomical region

73.6