Table 2. Multivariate regression results of predictors for occult metastases.

	B	S.E.	Wald	OR	95% CI	P value
Weight loss	1.195	0.619	3.727	3.302	0.982–11.108	0.054
ALT >40 U/L	−1.302	0.659	3.905	0.272	0.075–0.989	0.048*
CEA, ng/mL	0.072	0.045	2.539	1.074	0.984–1.173	0.111
CA19-9, ×100 U/mL	0.097	0.037	6.985	1.102	1.025–1.184	0.008*
CA125, U/mL	0.028	0.013	4.217	1.028	1.001–1.055	0.040*
Tumor site, body or tail	0.398	0.632	0.396	1.489	0.431–5.142	0.529
Tumor size, >40 mm	0.224	0.586	0.146	1.251	0.397–3.942	0.703
Regional lymph nodes enlargement	1.204	0.562	4.579	3.332	1.107–10.033	0.032*

B, regression coefficient; S.E., standard error; OR, odds ratio; CI, confidence interval; ALT, alanine aminotransferase. *, P<0.05.