Table 2.
Treatment | No. mice | Adenoma | Adenocarcinoma | Total tumors | |||
---|---|---|---|---|---|---|---|
Incidence | No. tumors/mouse | Incidence | No. tumors/mouse | Incidence | No. tumors/mouse | ||
Urethane | 15 | 15 (100) | 7.1 ± 3.2 | 3 (20) | 2.0 ± 1.0 | 15 (100) | 9.5 ± 3.8 |
Vehicle | 10 | 0 (0) | 0 | 0 (0) | 0 | 0 (0) | 0 |
Data are means ± SD. Numbers in parentheses are the percentages of mice with lung tumors.