Pengaruh Pendidikan Kesehatan tentang Sadari Melalui Media Line Messenger dan Whatsapp Messenger terhadap Pengetahuan dan Sikap Remaja Putri

The incidence of breast cancer in Surakarta City had the highest number with 22,232 patients in 2016. BSE as an early detection of breast cancer could reduce mortality by 25-30%. Teenage girls as young women needed to get health education about BSE through the right media, such as LINE Messenger and WhatsApp Messenger, as the most widely used social media in Indonesia. This study analyzed BSE health education effect through LINE Messenger and WhatsApp Messenger on the teenage girls’ knowledge and attitude. This research type was a Quasi experiment with a pretest-posttest design with control group. The study population were all girls of XI and XII grade. The sampling used proportional stratified random sampling, namely experiment group (55 teenage girls) and control grup (55 teenage girls) with a total sample of 110 teenage girls. The result of statistical test was done by paired t-test, showed that there were differences in average scores of knowledge (p<0,001) and attitude (p<0,001) in the experimental group and there were differences in average scores of knowledge (p<0,001) and attitude (p