Expression of β-tubulin in the 4 tissue types.
| Type | n | - | + | ++ | +++ |
|---|---|---|---|---|---|
| Normal tissuea | 30 | 5 | 9 | 12 | 4 |
| Premalignant lesionb | 50 | 2 | 11 | 26 | 11 |
| DCISc | 50 | 0 | 5 | 25 | 20 |
| IDCd | 50 | 0 | 6 | 18 | 26 |
| Total | 180 | 7 | 31 | 81 | 61 |
↵There was statistically significant differences among the 4 tissue types (χ2 = 25.381, P < 0.05). Comparison of any two groups: a:b, z = -1.992, P < 0.05; a:c, z= -3.807, P < 0.05; a:d, z = -4.161, P < 0.05; b:c, z = -2.469, P < 0.05; b:d, z = -3.120, P < 0.05; c:d, z = -0.909, P > 0.05.