Variable	Description	Measurement
MOTYB	The MOTYB evaluates the presence of inattention [50] Recite the month of the year backwards beginning with December	Every omission is an error and scored with one point More than 30 s for task, one additional point Inattention is present with a score of ≥ 3 [36]
MSQ	Screener with 10 items for cognitive impairment to test the time orientation, person, place and memory [37] Adaptation of the first and second questions of the original questionnaire, because of different setting: (1) “what is the name of this place?” and (2) “where is this located (address)?” have been changed to (1) “What is the name of this nursing home?” and (2) “Where is this nursing home located?” The remaining questions are for example: “What is today`s date?”, “How old are you?”, “Who is the President of the United States?”	Dichotomous questionnaire with the answers “correct”, “incorrect” or “not applicable” The MSQ score counts the number of correct answers A test score of 7 or less presents cognitive impairment
The Comprehension Test	The test evaluates disorganized or incoherent thinking [38] It contains four questions such as: “Will a stone float on water?” or “Can you use a hammer to pound a nail?”	Dichotomous questions answerable with “correct” or “incorrect” Difficulties in logical reasoning is present with a score of 2 or less
Onset of cognitive alteration and fluctuation course	Cognitive changes are rated based on observation, described in health records and information by care workers or relatives	Dichotomous question with “yes” or “no”
mRASS	Observational instrument to assess levels of consciousness [39] Hyperactive and hypoactive levels of consciousness are captured	The scores range from − 5 unarousable, 0 alert to + 4 combative Every score other than 0 indicates an altered level of consciousness

MOTYB month of the year backwards test; MSQ Mental Status Questionnaire, mRASS Modified Richmond Agitation and Sedation Scale