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Table 2 Relationship between level of MMP-13 expression and MI

From: Elevated expression of MMP-13 and TIMP-1 in head and neck squamous cell carcinomas may reflect increased tumor invasiveness

  MMP-13 staining
Grade of tumor invasion Negative/weak (0 + 1) Moderate/ extensive (2 + 3) Total
1 (1 + 2) 15 (83.3%) 3 (16.7%) 18
2 (3) 14 (32.6%) 29 (67.4%) 43
3 (4a + 4b) 5 (29.4%) 12 (70.6%) 17
Total 34 44 78
  1. MI: mode of tumor invasion (expressed as grade). p values: 0.001