“…However, evaluations of the effectiveness of proactive home visit programs in systematic literature reviews and meta-analyses yield inconsistent results: Some individual studies report positive effects on patient outcomes such as functional status, mental health, and perceived social support, whereas others find no results at all (Elkan et al, 2001; Hoogendijk, 2016; Huss et al, 2008; Marek & Baker, 2006; Markle-Reid et al, 2006; Stuck et al, 2002). So far, this inconsistency remains poorly understood: Differences in study design, program characteristics, target populations, and context complicate the investigation of what program components contribute to a change in outcomes (Huss et al, 2008; Liebel et al, 2009; Markle-Reid et al, 2006). In addition, little information exists about how aspects of the care process (such as implementation, quality of delivery, and the extent to which care is tailored) influence program impact.…”