Cancer survival: the CONCORD-2 study – Authors' reply

摘要

Ruffo Freitas-Junior and colleagues ask if the data from Goiania, Brazil, are reliable. We paid obsessive attention to documenting the quality of data and survival estimates. The estimates for Goiania were fl agged as less reliable than would be preferred for breast cancer and for eight of the other nine cancers examined in adults (see p 84 and p 99 in the appendix of our Article1). We agree that the flagged estimates for Goiania are not optimal; improvement in data quality is in progress. Data from fl agged survival estimates were not included in pooled national estimates