The Impact of in Intervention Program on Oral Cancer Awareness and Practice of Preventive Behaviors in High-Risk Indigenous Community in Sarawak, Malaysia

Abstract

Background: Oral cancer is highly prevalent among indigenous people in Sarawak as this population lacks awareness and is known to practice high-risk habits. Aim: This study aimed to develop and evaluate the impact of an educational intervention to improve oral cancer awareness and practice of preventive behavior among high-risk indigenous communities in Sarawak, Malaysia. Methods: A quasi-experimental study was undertaken involving adults in a Bisaya community (with high risk habits) in Limbang, Sarawak. The intervention group received a structured, Health Beliefs Model (HBM) theory-based oral cancer education module, while the control group was exposed to the conventional oral cancer education method during Ministry of Health's community oral cancer and precancer screening program. Face-to-face interviews using a validated structured questionnaire were conducted to obtain baseline information prior to intervention and after one and three months. Descriptive and multivariate statistics were used for analyzing the data using SPSS software. Results: The overall response rate was 99.5%. The final sample comprised of 204 respondents (89 in the control group and 115 in the intervention group). At baseline, 75.1% of respondents had heard about oral cancer, however their in-depth knowledge on risk factors, signs and symptoms and prevention were lacking. The control group had better awareness than the intervention group. Smoking and alcohol drinking were more prevalent in the intervention group, whereas betel quid chewing and practice of mouth self-examination (MSE) were more evident in the control group. At 1-month and 3-month follow-up, there were significantly higher mean scores in all aspects of oral cancer awareness among respondents in the intervention group and these improved levels of awareness were maintained over a period of 1- and 3-months. There were higher proportion of smokers, alcohol drinkers and betel quid chewers in the intervention group who reported quitting their habits or reducing the number of cigarettes smoked per day, frequency of alcohol drinking and betel quid chewing than the control group. The respondents in the intervention group also had significant increase in uptake of MSE and higher proportions who performed it once a month. Conclusion: The structured HBM-based oral cancer health education intervention was shown to have significant impacts on oral cancer knowledge and awareness, cessation and reduction of risk habits and increased the uptake of MSE among respondents in the intervention group of this indigenous community. Therefore, the introduced structured health education intervention is recommended for other communities in Malaysia that practice the same oral cancer risk habits. Considering this indigenous community is of lower socioeconomic status (SES), the introduced intervention could also be extended to other lower SES groups in Malaysia.