Fig. 1

Study flow. Among women over age 40 years old who received NHIC health examination and cancer survey in 2009, a total of 2,181,166 subjects remained in the final study population after excluding the specified groups.

Study flow. Among women over age 40 years old who received NHIC health examination and cancer survey in 2009, a total of 2,181,166 subjects remained in the final study population after excluding the specified groups.