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Jolanda C M van Haastregt a Research
Division, Institute for Rehabilitation Research, PO Box 192, 6430 AD
Hoensbroek, Netherlands, b Department of Medical Sociology, Maastricht
University, PO Box 616, 6200 MD Maastricht, Netherlands, c Department of
Epidemiology, Maastricht University, d Department of General Practice,
Maastricht University
Correspondence to: J C M van
Haastregt jolanda.vanhaastregt{at}irv.nl
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Abstract |
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Objective:
To assess the effects of preventive home
visits to elderly people living in the community.
The development of effective preventive interventions
aimed at the maintenance of health and autonomy of elderly people
living in the community has received much attention in the past two
decades. In both North America and north west Europe a substantial
number of randomised controlled trials have examined the effects of
preventive interventions on elderly people living in the community. We
focus on one specific category of these interventions: preventive home visits.
On the basis of the definition of comprehensive geriatric assessment by
Stuck,1 we defined preventive home visits as visits to
independently living elderly people, which are aimed at
multidimensional medical, functional, psychosocial, and environmental
evaluation of their problems and resources. This evaluation results in
specific recommendations aimed at reducing or treating the observed
problems and preventing new ones.
In 1993 Stuck et al performed a meta-analysis of randomised
controlled trials examining the effects of five types of comprehensive geriatric assessment,1 one of which concerned elderly
people living at home. This kind of geriatric assessment at home is
fairly comparable to preventive home visits. The authors concluded that assessment of elderly people at home seems to have some positive effects on mortality, residential status (a higher percentage living at
home), and number of hospital admissions. Owing to conflicting results
and the small number of trials included in the analyses, however, many
aspects of the potential effectiveness of such interventions remained
unclear. In the past seven years a substantial number of new randomised
controlled trials have been performed to gain more insight into the
effects of preventive home visits to elderly people living in the
community. Our systematic review provides an updated and elaborated
qualitative analysis of available such trials. Given the considerable
heterogeneity of the interventions we decided not to pool the data of
the trials. Pooling the data in case of heterogeneity might lead to
oversimplified conclusions.
2 3
We aimed to summarise the
effects of preventive home visits on physical function, psychosocial
function, falls, admissions to institutions, and mortality in elderly
people living in the community and to assess the methodological quality
of the trials included.
Search strategy
Selection of articles
Criteria based analysis
Patient selection
Interventions
Outcome measurement
Statistics
Design:
Systematic review.
Setting:
15 trials retrieved from Medline, Embase, and
the Cochrane controlled trial register.
Main outcome measures:
Physical function, psychosocial
function, falls, admissions to institutions, and mortality.
Results:
Considerable differences in the
methodological quality of the 15 trials were found, but in general the
quality was considered adequate. Favourable effects of the home visits were observed in 5 out of 12 trials measuring physical functioning, 1 out of 8 measuring psychosocial function, 2 out of 6 measuring falls, 2 out of 7 measuring admissions to institutions, and 3 of 13 measuring
mortality. None of the trials reported negative effects.
Conclusions:
No clear evidence was found in favour of
the effectiveness of preventive home visits to elderly people living in
the community. It seems essential that the effectiveness of such visits
is improved, but if this cannot be achieved consideration should be
given to discontinuing these visits.
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Introduction
Top
Abstract
Introduction
Methods
Results
Discussion
References
![]()
Methods
Top
Abstract
Introduction
Methods
Results
Discussion
References
We identified randomised controlled trials by searching
Medline (1966 to May 1999), Embase (1989 to March 1999), and the
Cochrane Controlled Trials Register and by screening references given
in relevant systematic reviews and identified trials. No language
restrictions were imposed. For the selection of randomised controlled
trials the first stage of the search strategy recommended by the
Cochrane Collaboration4 was used in conjunction with a
specific search for the intervention and population at issue. We used
the key words "geriatric assessment," "home visit," "health
visit," and "health screening" combined with the exploded MeSH
term "aged" and any of the words "prevent," "screen,"
"health education," or "health promotion." We used wild card
characters to ensure that all forms of words were included.
We included articles in two stages. At the first
stage all articles were included that described randomised controlled trials studying the effects of interventions consisting of
home visits to elderly people living in the community aged 65 and
over. Inclusion criteria were applied independently by two reviewers
(JCMvH and JPMD) to the abstracts, titles, and keywords of the
references retrieved by the literature search. Subsequently, the full
text of the included articles was retrieved, and author, institution,
and journal name were removed from the copies. At the second stage the
two reviewers applied the following additional inclusion criteria to
the "blinded" articles to make a final selection of articles for
review: (a) the home visits were aimed at prevention or
reduction of problems and risks related to ageing; (b)
during the home visits an (multidimensional) evaluation of
problems and resources in at least two of the following categories was
performed: medical, functional, psychosocial, or environmental. This
evaluation resulted in specific recommendations aimed at reducing or
treating the observed problems and preventing new ones;
(c) the home visits were not exclusively aimed at
patients who had been discharged from hospital; (d) the
home visits were not exclusively aimed at helping patients to cope with
a specific illness; and (e) data on at least one of the
following outcome measures were presented: physical function,
psychosocial function, falls, admissions to institutions, and
mortality. Disagreement between the reviewers was resolved by consensus.
To assess the methodological quality of the included trials
we used an adapted version of the criteria list by van Tulder et al
(box).5
Criteria list for assessment of methodological quality of
trials
Data extraction
The reviewers independently extracted the following data
from the articles on a structured form: country, number of subjects in
each study group, characteristics of subjects, duration of follow up,
characteristics of the intervention, and results regarding physical
function, psychosocial function, falls, admissions to institutions, and mortality.
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Results |
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Search strategy
Overall, 244 abstracts were screened resulting in the first
stage inclusion 29 of potentially relevant articles.6-33 After applying the second stage inclusion criteria to the full text of
these articles, 16 studies remained. One study14 was an
elaboration of a previously published study, so we decided only to
review the previous one. We finally included 15 studies.
9 11 13 15 17 18 19 23 25 26 29 31-33
Methodological quality of the included studies
Table 1 shows the methodological quality of the 15 studies.
The quality scores ranged from 29% to 71%, with a mean score of 54%.
The main shortcomings of the studies were in the areas of blinding the
regular providers of care to the intervention, reporting on the
presence or absence of cointerventions, reporting on compliance to the
intervention, blinding of the subjects to the intervention, blinding of
outcome assessors, handling of drop outs, and intention to treat
analysis. In less than 50% of the studies, all these criteria were
partly or completely fulfilled.
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Characteristics of the interventions
The main characteristics and objectives of the included
trials can be found on the website. Substantial differences are seen
between the interventions of the 15 trials. In most of the trials the
intervention was aimed at the general population of elderly people aged
65 or over, without a specific selection. Six trials focused on
subjects aged 75 or over.
9 15 18 23 25 26
In only one
trial was the intervention aimed at subjects with specific risk
factors.29 In nine trials the interventions lasted more
than two years,
9 13 15 19 23 26 31 32
and in seven trials the intervention consisted of at least two visits a
year.
9 11 15 17 23 26 29
In general, preventive home
visits were tailored to the needs of the individual subjects. In nine
trials, however, special attention was given to tailoring the
intervention to the needs of the subjects by making the number of
visits variable and dependent on the specific needs of the
subjects.
9 13 15 19 23 29 31 32
Outcomes of the studies
The main results of the included studies are shown in table
2. Overall, 94 outcome measures were investigated, all of which could
be classed in one of the following five categories: physical function,
psychosocial function, falls, admission to institutions, and mortality.
Eight trials reported at least one (significant) favourable effect of
the intervention,
9 11 15 17-19 26 29
five trials
reported no effects,
13 23 25 32 33
and in the two
combined trials of Vetter et al a favourable effect was
reported in Gwent but no effects were reported in
Powys.31 None of the trials reported negative
effects.
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Discussion |
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No clear evidence exists for the effectiveness of preventive home visits to elderly people living in the community. The observed effects of the interventions are considered to be fairly modest and inconsistent, especially as preventive home visits are costly and time consuming. This indicates a need for further improvement in the effectiveness of preventive home visits to make these interventions more beneficial in the long term. If substantial improvements in effectiveness cannot be achieved, consideration should be given to discontinuing such visits.
Although we found considerable differences in the methodological
quality of the 15 trials
scores ranged from low (29%) to good
(71%)
generally, the quality was considered adequate. Considerable methodological improvements are, however, still possible in the blinding of outcome assessors, handling of drop outs, checking for
cointerventions, assessing and reporting compliance to the intervention, and performing intention to treat analyses.
Methodological issues
Our results might be criticised for several reasons.
Firstly, although several different search strategies were used to
detect relevant trials it is possible that we failed to detect
unpublished outcome data, owing to publication bias. Such bias arises
when non-significant or negative outcome data are selectively omitted
from publication. The potential effect of publication bias on the
outcomes of our review might therefore be a further weakening of the
already rather modest evidence for the effectiveness of preventive home visits.
Implications
To improve the effectiveness of preventive home visits it
is important to gain a better understanding of the relation between
specific characteristics of the home visits and favourable outcomes.
Based on the information available, however, we could not reliably
assess this mainly because of the multidimensional character of the
interventions, which makes it difficult to distinguish the active
elements from the total set of programme elements.
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What is already known on this topic
A meta-analysis of randomised controlled trials in 1993 examined the effects of five different types of comprehensive geriatric assessment, one of which concerned elderly people living in the community (preventive home visits). Owing to conflicting results and the small number of studies included, however, many aspects of the potential effectiveness of this kind of home visit remained unclear In the past seven years a substantial number of new randomised controlled studies have been performed What this study addsLittle evidence exists in favour of the effectiveness of preventive home visits to elderly people living in the community Previous indications that preventive home visits have favourable effects on mortality and the number of hospital admissions were not confirmed by the results of this review |
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Acknowledgments |
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Contributors: JCMvH devised and instigated the study and performed the literature searches and with JPMD identified the articles from the literature search that met the inclusion criteria for this study, scored the methodological quality and effectiveness of the trials, and performed the data extraction. The paper was written by JCMvH, JPMD, EvR, HFJMC, and LPdeW. HFJMC will act as guarantor for the paper.
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Footnotes |
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Funding: Zorg Onderzoek Nederland and Stichting Onderzoek en Ontwikheling Maatschappeljke gezondheidszorg.
Competing interests: None declared.
website extra: A table with details of the preventive home visits appears on the BMJ's website www.bmj.com
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(Accepted 6 December 1999)
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