Acceptance on colorectal cancer screening upper age limit in South Korea

Table 3 Logistic regression for acceptance of an upper age limit for colorectal cancer screening at 80 years according to colorectal cancer screening history (n = 1992)

Variable	Stop CRC screening at 80 yr
	Never-screened (n = 504)		Ever-screened (n = 1418)
	aOR	95%CI	aOR	95%CI
Age group
50-59	1.00		1.00
60-69	1.46	0.62-3.42	1.16	0.85-1.59
70-74	0.60	0.22-1.66	0.71	0.44-1.13
Sex
Male	1.00		1.00
Female	0.25	0.08-0.82	1.07	0.72-1.59
Residential region
Rural	1.00		1.00
Urban	2.25	0.69-7.34	1.21	0.84-1.75
Metropolitan	2.95	0.85-10.21	1.80	1.23-2.65
Education
No formal/Elementary school	1.00	1.00	1.00
Middle/High school	0.86	0.14-5.17	1.56	1.00-2.46
College or more	0.66	0.09-4.86	1.37	0.76-2.45
Household monthly income (USD)
< 3000	1.00		1.00
3000-5000	1.51	0.6-3.84	0.95	0.68-1.32
> 5000	0.77	0.25-2.36	0.98	0.63-1.54
Marital status
Living without spouse	1.00		1.00
Living with spouse	3.71	1.10-12.48	1.02	0.60-1.76
Other type of cancer screening in NCSP
No	1.00		1.00
Yes	0.81	0.39-1.66	0.56	0.29-1.05
Family history of cancer
No	1.00		1.00
Yes	0.90	0.36-2.25	0.61	0.46-0.82
Lifetime smoking
Never or < 5 packs	1.00		1.00
More than 5 packs	7.10	1.24-40.61	1.33	0.89-1.99
Drinking within 1 yr
Never	1.00		1.00
Sometime	0.72	0.3-1.75	1.14	0.83-1.55
Frequently	0.31	0.09-1.02	0.98	0.64-1.50
Exercise
Never	1.00		1.00
1-2 d per week	0.83	0.34-2.02	1.50	1.02-2.20
> 3 d per week	0.87	0.37-2.04	1.49	1.10-2.02

aOR: Adjusted odds ratio; CRC: Colorectal cancer; NCSP: National Cancer Screening Program.