Percent density was significantly higher in Chinese women ( 28.5 % ; 95 % CI 27.0 % , 30.0 % ) compared to Malay ( 24.2 % ; 95 % CI 22.5 % , 26.0 % ) and Indian ( 24.3 % ; 95 % CI 22.8 % , 25.7 % ) women ( p < 0.001 ) , after adjustment for age , BMI , menopausal status , parity and age at first full term pregnancy .