A large number of studies based on data from Patient registries are published.
I used to regard them as poor quality observational studies, mainly due to lack of control of data collection and to risk of selection bias.
In Sweden only there are 109 National Patient registries listed in the National Board of Health and Welfare.
http://www.socialstyrelsen.se/register/registerservice/nationellakvalitetsregister
(in Swedish only)
Lots of educational studies (studies performed as part of specialist training) get their data from these large scale, nation covering registries.
Can anyone direct me to a good checklist for critical appraisal of studies based on Patient registries?
Cheers,
Ulf Eriksson
Karlskrona
Sweden
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