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Survival figures were calculated from date of diagnosis to date of death or date of last follow-up.
Observation time was calculated from date of enrolment to study end date except where there was loss to follow up, diagnosis of TB, consent withdrawal or death.
Time to death in patients lost to follow-up was calculated from date of last visit until death if this occurred before database closure (25 January 2008), with right censoring of all patients who remained alive at this point.
Follow-up data of all the recruited colon cancer patients from both TexGen and TCH were acquired and survival time was calculated from date of diagnosis to the date of death or last follow-up in June, 2010.
Age: calculated from date of birth.
Survival was calculated from date of first treatment to death.
Overall survival was calculated from date of diagnosis to death, while disease-specific survival was calculated from date of diagnosis to death from tongue cancer.
EFS was calculated from date of relapse to occurrence of a subsequent relapse or death, and OS was calculated from date of relapse to death for any reason.
Age at menarche was calculated from date of menarche (month and year) and date of birth.
Age is calculated from date of birth and study entry date.
12 Age was calculated from date of birth with reference to 1 January 2010.
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CEO of Professional Science Editing for Scientists @ prosciediting.com