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Therapeutics
Routine testing before cataract surgery did not reduce medical adverse events

https://doi.org/10.1136/ebm.5.5.151

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    (2000) N Engl J Med 342, 168. Schein OD, Katz J, Bass EB, et al,. for the Study of Medical Testing for Cataract Surgery.. The value of routine preoperative medical testing before cataract surgery.. Jan 20;. :. –75.
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 QUESTION: In patients having cataract surgery, does routine pre-operative medical testing reduce medical adverse events?

    Design

    Randomised (allocation concealed*), blinded (outcome assessors),* controlled trial with 1 week follow up.

    Setting

    9 clinical centres in the US and Canada.

    Patients

    18 189 patients (mean age 74 y, 61% women) who were scheduled to have 19 557 cataract operations between 1995 and 1997. Exclusion criteria were age <50 years, general anaesthesia, myocardial infarction within the previous 3 months, pre-operative medical testing in the previous 28 days, or inability to speak English or Spanish. 19 250 cataract operations were done, and 19 217 operations (98% of enrolled operations) had 1 week of follow up.

    Intervention

    Each patient received a pre-operative medical assessment. Each patient with a scheduled cataract operation in a single eye …

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    Footnotes

    • Source of funding: US Agency for Health Care Policy and Research.

    • For correspondence: Dr O Schein, 116 Wilmer Building, Johns Hopkins Hospital, 600 North Wolfe Street, Baltimore, MD 21287-9019, USA. Fax +1 410 614 9651.

    • ↵* See glossary.