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Table 5 Comparison of frequency (individual-based) and lesion severity (based on articular surfaces) of TMJ-OA between the two subspecies Phoca v. richardii ([10] and Phoca v. vitulina [this study]. Only juvenile/subadult and adult individuals

From: Osteoarthritis of the temporomandibular joint in the Eastern Atlantic harbour seal (Phoca vitulina vitulina) from the German North Sea: a study of the lesions seen in dry bone

  P. v. richardii P. v. vitulina
Frequency (individuals)
 TMJ-OA yes 67 (34.5%) 963 (53.9%)
 TMJ-OA no 127 (65.5%) 824 (46.1%)
 Total 194 (100%) 1787 (100%)
Stage (articular surfaces)
 Normal 642 (82.7%) 4394 (61.5%)
 Mild 72 (9.3%) 1875 (26.2%)
 Moderate 38 (4.9%) 715 (10.0%)
 Severe 24 (3.1%) 164 (2.3%)
 Total 776 (100%) 7148 (100%)