Table 2

Factors associated with participation in endoscopy screening

Factors	Participants of high risk for UGC	Participants undertaking gastroscopy	Participation rate (%)	χ² value	P value
Age (year)
40–44	330	75	22.73	57.29	0.000
45–49	1097	296	26.98
49–54	1250	285	22.80
55–59	1840	455	24.73
60–64	2079	466	22.41
65–69	1551	295	19.02
70–74	625	85	13.60
Sex
Male	3313	658	19.86	18.84	0.000
Female	5459	1299	23.80
BMI
<18.5	230	33	14.35	12.09	0.778
18.5–23.9	4205	972	23.12
24–27.9	3431	768	22.38
≥28	906	184	20.31
Education
Primary school or below	336	54	16.07	58.69	0.000
Junior/senior school	6075	1248	20.54
Undergraduate or over	2361	655	27.74
Marriage
Unmarried	741	181	24.43	2.09	0.148
Married	8031	1776	22.11
Occupation
Professional and technical personnel	1372	394	28.72	70.40	0.000
Heads of state organs, enterprises and institutions	633	150	23.70
Staff	1141	275	24.10
Businessmen	301	68	22.59
Farmers	172	28	16.28
Workers	2711	506	18.66
Service workers	557	132	23.70
Housework	879	161	18.32
Other	1006	243	24.16
Smoking
Never	4914	1095	22.28	0.65	0.772
Current	3320	749	22.56
Former	538	113	21.00
Alcohol drinking
Never	4273	903	21.13	9.02	0.011
Current	4147	960	23.15
Former	352	94	26.70
Second smoking
No	2624	470	17.91	41.78	0.000
Yes	6148	1487	24.19
Tea
Never	5127	1136	22.16	0.92	0.632
Current	3033	675	22.26
Former	612	146	23.86
Physical activity
<3 times/week	5805	1382	23.81	22.20	0.000
≥3 times/week	2967	575	19.38
History of trauma
No	5209	939	18.03	135.74	0.000
Yes	3563	1018	28.57
History of mental depression
No	5192	920	17.72	154.64	0.000
Yes	3580	1037	28.97
History of upper gastrointestinal system disease
No	1459	221	15.15	51.80	0.000
Yes	7313	1736	23.74
Family history of UGC
No	5283	1046	19.80	48.29	0.000
Yes	3489	911	26.11
Total	8772	1957	22.31