Table 1

Assessment of risk and high-risk rates in UGC screening

Factors	Assessment number	High risk of UGC	High-risk rates(%)	χ² value	P value
Age (years)
40–44	1934	330	17.06	194.87	0.000
45–49	4878	1097	22.49
49–54	5333	1250	23.44
55–59	7277	1840	25.29
60–64	8800	2079	23.63
65–69	7078	1551	21.91
70–74	4069	625	15.36
Sex
Male	16 680	3313	19.86	97.83	0.000
Female	22 689	5459	24.06
Total	39 369	8772	22.28

UGC, upper gastrointestinal cancer.