Among them, except for 90’s, the proportion of BC patients in young adult group (< 40 years old) showed an increasing trend with age.
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A comparison of Chinese multicenter breast cancer database and SEER database.
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In addition, we found that the morbidity of aged + group (> 70) showed a decreasing trend year by year, respectively was 30.11%, 31.95%, 31.57% and 25.96%, and the median age was orderly 78 year, 78 year, 78 year and 77 year (Fig. 6 ).