The Effect of Educational Intervention Based on the Theory of Planned Behavior on Mammography Screening in Iranian Women.

Mammography is the most special screening method for early diagnosis of breast cancer. The purpose of present research is investigating the effect of educational intervention based on theory of planned behavior on mammography screening of women in Fasa city, Fars province, Iran. In this quasi-experimental study, 400 subjects (200 subjects for experimental group and 200 subjects for control group) were selected in 2017-2018. Educational intervention for the experimental group included 8 educational sessions. A questionnaire used for evaluating demographic information and constructs of theory of planned behavior (knowledge, perceived behavioral control, subjective norms, and attitude) investigated mammography performance of women before and 6 months after intervention. Data were analyzed by using SPSS 22 through chi-square test, McNemar's test, and Wilcoxon-Mann-Whitney test at significance level of P < 0.05. The average age of subjects was 45.52 ± 6.76 years in the experimental group and 45.12 ± 6.64 years in the control group. Six months after intervention, the experimental group showed significant increase in knowledge, perceived behavioral control, subjective norms, and attitude compared to the control group and 174 people (78%) of the experimental group had intention for doing mammography and 148 people (74%) of the experimental group performed mammography. Also, 6 months after educational intervention, 38 people (19%) of the control group had intention for performing mammography and 14 people (7%) of the control group performed mammography.