Baseline characteristics of study participants.

Data are mean ± standard deviation (SD) or n (percent). aBased on self-reported information from pre-randomisation baseline questionnaire. bSaid “no” to the following question: “Is there a friend, relative, or neighbour who would take care of you for a few days if necessary?” cThe Pra score is calculated from the person’s age, gender, hospital admissions, doctor visits, health status, diabetes status, heart disease status, and caregiver availability [23]. dBased on linkage with data from Swiss Federal Population Census 2000. eHigher scores denote higher levels of socio-economic status [25]. Baseline characteristics of study participants.