2.
两组大鼠体重及Lee's指数比较 （x±s）
| 组别 | n | 体重(g) | Lee's指数 |
| 普通饮食组 | 30 | 215±46 | 276.1±3.0 |
| 高脂饮食组 | 30 | 283±50 | 287.3±6.5 |
| t值 | -11.703 | -8.398 | |
| P值 | < 0.05 | < 0.05 |
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