Descriptive statistics and probability of no difference (Mann-Whitney test) of the 150 grade 1, 2, and 3 transitional cell carcinomas of the urinary bladder
| Variable | Grade 1 Mean (SD) | P | Grade 2 Mean (SD) | P | Grade 3 Mean (SD) | P | Grade 1 Mean (SD) |
|---|---|---|---|---|---|---|---|
| MAI, mitotic activity index; MNA-10, mean nuclear area of the 10 largest nuclei; P, probability of no difference. | |||||||
| No. of cases | 34 | 60 | 56 | 34 | |||
| MAI | 1.5 (2.00) | <0.0000 | 9.7 (6.51) | <0.0000 | 38.7 (14.5) | <0.0000 | 1.5 (2.00) |
| MNA-10 | 82.0 (25.26) | <0.0000 | 101.4 (21.30) | <0.0000 | 208.0 (87.7) | <0.0000 | 82.0 (25.26) |
| Ki-67 area % | 4.6 (3.39) | <0.0000 | 10.3 (5.93) | <0.0000 | 29.3 (10.4) | <0.0000 | 4.6 (3.39) |