Combined multidetector computed tomography and gastrointestinal endoscopy for gastric cancer screening, preoperative staging, and lymph node metastasis detection

Table 1 Number of detected cases of gastric cancer by different methods

Methods	Pathological examination		Total	Sensitivity, %	Specificity, %	Accuracy, %	Positive predictive value, %	Negative predictive value, %
	Positive	Negative
Endoscopic ultrasound positive	59	8	67	86.76 (59/68)	76.47 (26/34)	83.33 (85/102)	88.06 (59/67)	74.29 (26/35)
Negative	9	26	35
Total	68	34	102
MDCT positive	57	10	67	83.82 (57/68)	70.59 (24/34)	77.45 (79/102)	85.07 (57/67)	68.57 (24/35)
Negative	11	24	35
Total	68	34	102
Joint approach positive	67	1	68	98.53 (67/68)	97.06 (33/34)	98.04 (100/102)	98.53 (67/68)	97.06 (33/34)
Negative	1	33	34
Total	68	34	102
χ2				8.918	8.667	19.373	7.925	9.683
P value				0.012	0.013	0.001	0.019	0.008

MDCT: Multidetector computed tomography.

Table 2 Clinical T staging results of gastric cancer by different diagnostic methods

Pathology	Cases	Gastrointestinal endoscopy				Accuracy, %	MDCT				Accuracy, %	MDCT + gastrointestinal endoscopy				Accuracy, %
		T1	T2	T3	T4		T1	T2	T3	T4		T1	T2	T3	T4
T1	12	10	2	0	0	83.33	11	1	0	0	91.67	12	0	0	0	100.00
T2	18	1	16	1	0	88.88	2	15	1	0	83.33	1	17	0	0	94.44
T3	26	0	3	22	1	84.62	0	2	23	1	88.46	0	1	25	0	96.15
T4	12	0	0	2	10	83.33	0	0	2	10	83.33	0	0	0	12	100.00
Total	68	11	21	25	11	85.29	13	18	26	11	86.76	13	18	25	11	97.06

MDCT: Multidetector computed tomography.

Table 3 Clinical N staging results of gastric cancer by different diagnostic methods

Pathology	Cases	Gastrointestinal endoscopy				Accuracy, %	95%CI	MDCT				Accuracy, %	95%CI	MDCT + gastrointestinal endoscopy				Accuracy, %	95%CI
		N0	N1	N2	N3			N0	N1	N2	N3			N0	N1	N2	N3
N0	18	15	3	0	0	83.33	(58.58-96.42)	16	2	0	0	88.89	(65.29-98.62)	17	1	0	0	94.44	(72.71-99.86)
N1	19	4	13	2	0	68.42	(43.45-87.42)	3	16	0	0	84.21	(60.42-96.62)	1	17	1	0	89.47	(66.86-98.70)
N2	21	0	4	17	0	80.95	(58.09-94.55)	0	4	17	0	80.95	(58.09-94.55)	0	1	20	0	95.24	(76.18-99.88)
N3	10	0	0	7	3	30.00	(6.67-65.25)	0	0	5	5	50.00	(18.71-81.29)	0	0	1	9	90.00	(55.50-99.75)
Total	68	19	20	26	3	70.59	(58.32-81.00)	19	21	22	5	79.41	(67.94-88.26)	18	19	22	9	92.65	(83.68-97.57)

MDCT: Multidetector computed tomography; CI: Confidence interval.