Table 3. Comparison of preoperative anemia status and tumor marker index of participants among the three groups.

Item		n	Non anemia (n = 52)	Microcytic anemia (n = 14)	Normocytic anemia (n = 29)	χ 2	P
CEA (µg/L)						2.339	0.196
	(−)	71	43	10	18
	(+)	24	9	4	11
CA199(U/mL)						1.435	0.326
	(−)	83	47	13	23
	(+)	12	5	1	6
CA724(U/mL)						6.871	0.291
	(−)	81	52	10	19
	(+)	14		4	10
CA242(U/mL)						0.765	0.572
	(−)	79	46	11	22
	(+)	16	6	3	7
CA125(U/ mL)						1.284	0.423
	(−)	76	47	10	19
	(+)	19	5	4	10
	mGPS score					0.970	0.000*
	0	39	31	1	7
	1	35	11	7	17
	2	21	10	6	5

Notes.

P-values were obtained using χ2 tests for categorical variables.

The asterisk implies statistical significance.