Characteristics of study population, N (%).
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¥Statistically significant difference (p<0.01) between 98–99, 00–01 and 02–03 cohort. * There were 31 beneficiaries with unknown race, and 32 with missing urban/rural status. †Including comorbidities developed within 5 years after baseline colonoscopy (or until censoring or event). Characteristics of study population, N (%).
创建时间：
2014-11-13
