Seasonal variation in breast cancer diagnosis in Singapore.

This study investigates seasonality in the diagnosis of 3219 female breast carcinoma cases reported between 1995-8 in Singapore. There is little evidence of marked seasonal variation. Angular regression suggested that observed differences in peak diagnosis with respect to menopausal status, tumour size, ER and PR status may be chance.
(Copyright 2001 Cancer Research Campaign http://www.bjcancer.com.)