Patients are far less satisfied with their treatment at Long Island hospitals than patients in hospitals elsewhere in the United States, according to updated government data. But while many local hospitals receive lower scores because of such things as noise and the cleanliness of the room, the biggest concern for any potential patient centers on the medical care they will receive.

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You can raise the odds of a successful hospital stay. For example, medical errors by doctors and nurses that occur in the hospital can often be prevented by vigilant patients and their families. Learn how to better prepare yourself at a free seminar presented by patient advocates, nurses and legal experts at Levittown Library on March 26 at 7 p.m. Registration is required; call 516-731-5728, ext. 506.

For more on how to prevent medical errors, go to nwsdy.li/mederrors. For updated hospital ratings, go to nwsdy.li/hospitals and nwsdy.li/hospitals-cms.