Table 1. Coincidence of ubiquitin-specific protease 22 messenger RNA and protein expression in non-small cell lung cancer tissues.

		USP22 mRNA		P value	κ
		High	Low or unchanged
USP22 protein	High	12	2	0.000	0.732
	Low or unchanged	2	14

USP22, ubiquitin-specific protease 22; mRNA, messenger RNA.