Graduate School of Business, University Science Malaysia (USM), 11800, Penang, Malaysia.
School of Business and Law, Edith Cowan University (ECU), Joondalup, 6027, Australia.
Environ Sci Pollut Res Int. 2020 Aug;27(22):28030-28041. doi: 10.1007/s11356-020-09125-0. Epub 2020 May 14.
This study examined behavioural intention to dispose of unused medicines using a comprehensive model integrating the theory of planned behaviour (TPB), with knowledge as a driver of personal norms; attitudes, personal norms, and perceived busyness as additional drivers of behavioural intention; and perceived convenience as a moderator. The model was tested with data collected from 204 respondents using the partial least squares technique. Knowledge about the proper disposal of unused medicines was recognized as a strong predictor of personal norms and attitudes towards proper disposal of waste medications. The results showed that attitudes, personal norms, perceived busyness, and perceived behavioural control have significant effects on intention to dispose of unused medicines. Furthermore, perceived convenience moderates the impacts of attitude, personal norms, and perceived behavioural control on intention to dispose of unused medicines. The extended TPB explained 55.7% of the variance of intention to dispose of unused medicines properly. Our results indicate the importance of integrating additional variables into the TPB to enhance its explanatory power in predicting behavioural intention. The results suggest to governments that in order to implement planned programs for proper collection and destruction of waste medication, a plan is needed to enhance public knowledge on the impacts of improper medication waste disposal on the environment, and also that collection points should become accessible for anyone.
本研究采用整合计划行为理论（TPB）的综合模型，检验了处理未使用药品的行为意向，将知识作为个人规范的驱动因素；态度、个人规范和感知忙碌程度作为行为意向的额外驱动因素；感知便利性作为调节因素。该模型使用 204 名受访者的数据，采用偏最小二乘法进行了测试。关于正确处理未使用药品的知识被认为是个人规范和正确处理废弃药物态度的有力预测因素。结果表明，态度、个人规范、感知忙碌程度和感知行为控制对处理未使用药品的意图有显著影响。此外，感知便利性调节了态度、个人规范和感知行为控制对处理未使用药品意图的影响。扩展的 TPB 解释了 55.7%的正确处理未使用药品意图的方差。研究结果表明，在预测行为意图时，将其他变量纳入 TPB 可以增强其解释能力。研究结果表明，政府需要制定计划，提高公众对不当药物废物处置对环境影响的认识，同时应使收集点更便于任何人使用，以便实施妥善收集和销毁废弃药物的计划。
