Table 1.

Overview of data collection

Data	Collection time	Purpose
Institution questionnaire resident capacity mean length of stay of residents mean age of residents presence of oral health care providers	baseline baseline baseline baseline	comparison institutions comparison institutions comparison institutions comparison institutions
Nurses and nurse aides questionnaire gender age years of experience oral health knowledge attitude to personal oral health care	baseline/6 months baseline/6 months baseline/6 months baseline/6 months baseline/6 months	comparison nurses and nurse aides comparison nurses and nurse aides comparison nurses and nurse aides intervention effect intervention effect
Resident questionnaire
Age	baseline	comparison residents
Gender	baseline	comparison residents
Primary diagnoses	baseline	comparison residents
secondary diagnoses	baseline	comparison residents
prescribed drugs	baseline	comparison residents
Care Dependency Scale	baseline	comparison residents
Mini Mental State Examination	baseline	comparison residents
Oral examination Plaque index (natural teeth, denture)	baseline/6 months	intervention effect