Table 1 Mean number of calcified discs, visible on radiographic examination (CDVR), number of dogs having 4 or less and 5 and more CDVR and dogs having CDVR at surgery site in 100 surgeries for disc extrusion in different age groups.
|  | ≤ 4 years | Age groups 5-7 years | ≥ 8 years |
|---|---|---|---|
Nr of dogs in groups | 27 | 53 | 20 |
Mean nr of CDVR ± SD | 5.74 ± 3.24a | 5.17 ± 3.83a | 2.4 ± 3.42b |
Nr of dogs with ≤ 4 CDVR | 10 (37%) | 27 (51%) | 16 (80%) |
Nr of dogs with ≥ 5 CDVR | 17 (63%) | 26 (49%) | 4 (20%) |
CDVR at surgery site | 14 (52%)ab | 35 (66%)b | 5 (25%)a |