aged female 5 human 5 male 5 Article 4 adult 4 major clinical study 4 Aged 3 Female 3 Humans 3 Malaysia 3 Male 3 controlled study 3 questionnaire 3 scoring system 3 Adult 2 Middle Aged 2 Surveys and Questionnaires 2 double blind procedure 2 government 2 middle aged 2 outcome assessment 2 randomized controlled trial 2 smoking 2 Age Factors 1 Aged, 80 and over 1 Airway obstruction 1 Anti-Infective Agents, Local 1 Aspiration 1 Brief Oral Health Status Examination score 1