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. 2007 Mar 27;96(8):1197–1203. doi: 10.1038/sj.bjc.6603709

Box 2. Selection of sample.

Study sample (n=729) All women aged ⩾65 years, resident in Greater Manchester, recorded on Cancer Registry with an anniversary date for invasive breast cancer in 1999.
Exclusions (n=249) Case notes not available for review (n=136); pilot study – randomly selected (n=33); metastatic breast cancer diagnosed at presentation (n=51); Diagnosis and/or hormone therapy pre 7 July 1998 (n=21); Anniversary date pre 1 January 1999 (n=2); Ductal carcinoma in situ (n=4); Moved into/away from Greater Manchester during treatment (n=2).
Final sample n=480