Objective: The study aim was to investigate the association between knowledge of breast cancer and practice of breast self-examination (BSE) and having clinical breast examination (CBE) in a crosssectional sample of 700 Malaysian secondary school teachers.
Methodology:A two-stage sampling frame was used; a simple random sample of 10 out of 24 schools was selected and all teachers within those schools were invited to participate. The following data were collected using a self-administered questionnaire (i) sociodemographic data, (ii) five knowledge categories: general knowledge of breast cancer, signs and symptoms, risk factors, mammography, recommended frequency of BSE and CBE, and (iii) practiceof BSE and CBE.Results: The response rate was 74% (518/700). Level of exercise was associated with BSE (p=0.02) and CBE (p=0.01), with exercise twice a week showing the strongest association compared to never exercising, OR=2.71 (95% CI=1.38-5.33, p=0.004) for BSE, OR=2.40 (95% CI=1.27-4.55, p=0.007) for CBE. Self-report of having an annual medical check up was associated with BSE, OR=2.13, (95% CI=1.29-3.52, p<001) and CBE, OR=2.41, (95% CI=1.57-3.70, p<001). Likelihood of practicing BSE improved with increasing total knowledge score (quartiles) in a dose dependent manner, Q2, OR =1.78 (95% CI 0.97-3.27), Q3OR =1.89 (95% CI 1.06-3.36), Q4OR =2.2 (95% CI 1.15-3.91, p=0.02) compared to the lowest quartile Q1 when adjusted forexercise and annual checkup. Knowledge of symptoms and signs was associated with BSE practice, OR =1.25 (95% CI 1.06-1.48, p=0.009) and CBE, OR =1.3 (95% CI 1.08-1.57, p=0.005) having adjusted for exercise and annual checkup (BSE and CBE) and age and marital status (CBE). General knowledge was also positively associated with BSE, OR=1.39 (95% CI 1.07-1.81, p=0.01) after adjustment though not with CBE (p=0.41). Knowledge of mammography was inversely associated