Gastric cancer mortality related to direct radiographic and endoscopic screening: A retrospective study

Table 1 Characteristics of individuals aged 40 to 79 years who participated in gastric cancer screening in Maebashi City, Japan, in 2006

		Screening method
		Endoscopy	Radiography	P value
Participants, n		10747	11155
Sex, n (%)	Male	4323 (40.2)	4103 (36.8)	< 0.001
	Female	6424 (59.8)	7052 (63.2)
Age group, n (%)	40–49 yr	952 (8.9)	1005 (9.0)	NA
	50–59 yr	2043 (19.0)	2264 (20.3)
	60–69 yr	3667 (34.1)	3986 (35.7)
	70–79 yr	4085 (38.0)	3900 (35.0)
Age group, n (%)	40–59 yr	2995 (27.9)	3269 (29.3)	0.019
	60–79 yr	7752 (72.1)	7886 (70.7)
Age, mean (SD), yr		64.75 (9.69)	64.30 (9.57)	< 0.001

NA: No significant.

Table 2 Characteristics of individuals aged 40 to 79 years who participated in gastric cancer screening in Maebashi City, Japan, in 2006 and did not subsequently receive annual screening

		Screening method
		Endoscopy	Radiography	P value
Participants, n		6915	4382
Sex, n (%)	Male	2680 (38.8)	1570 (35.8)	0.002
	Female	4235 (61.2)	2812 (64.2)
Age group, n (%)	40–49 yr	764 (11.0)	552 (12.6)	NA
	50–59 yr	1483 (21.4)	1032 (23.6)
	60–69 yr	2372 (34.3)	1528 (34.9)
	70–79 yr	2296 (33.2)	1270 (29.0)
Age group, n (%)	40–59 yr	2247 (32.5)	1584 (36.1)	< 0.001
	60–79 yr	4668 (67.5)	2798 (63.9)
Age, mean (SD), yr		63.54 (9.99)	62.51 (10.08)	< 0.001

NA: No significant.

Table 3 Characteristics of individuals aged 40 to 79 years who participated in gastric cancer screening in Maebashi City, Japan, in 2006 and subsequently received annual screening

		Screening method
		Endoscopy	Radiography	P value
Participants, n		3832	6773
Sex, n (%)	Male	1643 (42.9)	2533 (37.4)	< 0.001
	Female	2189 (57.1)	4240 (62.6)
Age group, n (%)	40–49 yr	188 (4.9)	453 (6.7)	NA
	50–59 yr	560 (14.6)	1232 (18.2)
	60–69 yr	1295 (33.8)	2458 (36.3)
	70–79 yr	1789 (46.7)	2630 (38.8)
Age group, n (%)	40–59 yr	748 (19.5)	1685 (24.9)	< 0.001
	60–79 yr	3084 (80.5)	5088 (75.1)
Age, mean (SD), b		66.95 (8.71)	65.46 (9.03)	< 0.001

NA: No significant.

Table 4 Cox proportional hazards analyses of gastric cancer deaths in individuals aged 40 to 79 years who participated in gastric cancer screening in Maebashi City, Japan, in 2006

	Screening method	Participants, n (%)	Gastric cancer deaths, n (%)	Adjusted reduction rate1	95%CI
All participants	Radiography	11155	17	1.000
	Endoscopy	10747	23	1.368	0.7308–2.562
Participants receiving annual screening after 2006	Radiography	6773	7	1.000
	Endoscopy	3832	7	1.600	0.5604–4.569

¹Adjusted for sex and age group (40–59 years and 60–79 years).

Table 5 Cox proportional hazards analyses of all cancer deaths, without gastric cancer, in individuals aged 40 to 79 years who participated in gastric cancer screening in Maebashi City, Japan, in 2006

	Screening method	Participants, n (%)	Cancer deaths1, n (%)	Adjusted reduction rate2	95%CI
All participants	Radiography	11155	163	1.000
	Endoscopy	10747	178	1.090	0.8813–1.3480
Participants receiving annual screening after 2006	Radiography	6773	86	1.000
	Endoscopy	3832	68	1.284	0.9334–1.7650

¹Gastric cancer deaths are not included.

²Adjusted for sex and age group (40–59 years and 60–79 years).