Table 1.

Mean tumor growth time, delay time, and inhibition rate in CL1-5-F4 tumor bearing mice after treatment with erlotinib, and imipramine.

Treatment	MTGT (day)*	MTGDT (day)#	MGIR$
Vehicle	5.30	NA	NA
Erlotinib	11.88	6.58	2.24
Imipramine	10.79	5.49	2.04

NA, not available.

^*Mean tumor growth time (MTGT): the time at which the tumor volume reached 1000 mm³.

^#Mean tumor growth delay time (MTGDT): the mean tumor growth time of the treated group minus that of the control group.

^$Mean growth inhibition rate (MGIR): the mean tumor growth time of the treated group/the mean tumor growth time of the sham control group.