Knowledge, Attitude and Practice (KAP) Questionnaire

This questionnaire was adapted from previous studies by Institute of Public Health (20) (Module C) and modified to meet objectives of the study. The Knowledge, Attitude and Practice (KAP) Questionnaire comprises of three modules: Module A, Module B, and Module C. Module A includes sociodemographic and personal information of subjects such as name, gender, race, and education level. Module B consists of subject's health history whereas Module C consists of 18 questions that assess knowledge, attitude, and practice of salt intake. Practice of salt intake was assessed using the adopted and modified MySalt 2015 Knowledge, Attitude and Practice (KAP) questionnaire (20). In this questionnaire, questions related to salt intake practices were included as the following: Do you add extra soy sauce or sauce into food when you eat? How much salt is used when preparing food at home? Do you request for less salt when eating out? How much salt do you think you take every day? Is controlling salt intake your daily routine? If yes, how do you control it?

Each answer in Module C was scored in order to classify subject based on scoring by Bakaman et al. (1996) (21) as follows:

Subjects who scored more than 70 for each part were classified as having a good and satisfying knowledge, attitude, and practice on salt intake. The questionnaire was validated through a pilot study among 80 subjects in Selangor and Kuala Lumpur. Findings from the pilot study were analyzed using Cronbach Alpha to determine the reliability of the questionnaire. A value of 0.7 Cronbach Alpha was obtained, proving that this questionnaire is indeed reliable (22). A dual language version of this questionnaire was also created to ensure subjects have a better understanding of each of the questions.