Application of compression during mammography is crucial to reduce breast thickness and reducing
average glandular dose (AGD). With increasing participation in regular breast screening programmes, the
total AGD received by patient remains a concern. Therefore, this paper aimed to evaluate the effect of
compressed breast thickness (CBT) on the AGD during screening mammography using full field digital
mammogram (FFDM). This study involved retrospective collection of mammographic data and reports
from 148 women who came for screening mammography. Mammographic parameters which include
CBT, AGD, compression force and breast density for both breast on craniocaudal (CC) view and
mediolateral oblique (MLO) view were recorded and analysed. There was statistically significant
variation in the mammographic parameters value between CC and MLO projections but no significant
variation between right and left breasts. For CC projection, a weak positive correlation was identified
between CBT and AGD (r=0.115, p=0.049) and between CBT and compression force (r=0.172, p=0.003).
In addition, a weak positive correlation was also found between CBT and compression force (r=0.200,
p=0.001) and between CBT and AGD (r=0.292, p