The hospital, run by North Cumbria University Hospitals NHS Trust, is already being investigated over higher-than-expected mortality rates.
Meanwhile, Nottingham University Hospitals NHS Trust had a better than expected mortality rate in one of the indicators.
Its 2011 report said the trust had higher than expected mortality rates for deaths while in hospital care and for those following hospital treatment.
The same insurers have also argued that they make gains from lower-than-expected mortality and expense rates, which, they say, more than cover losses from annual pay-outs.
Pfizer's share price plunged after higher-than-expected mortality and side effects reported during a clinical trial led it to scrap a drug it had been developing since 1992.
Problems at the Sherwood Forest Hospitals Trust were first highlighted last year after the Dr Foster guide to hospitals showed higher than expected mortality rates in two categories.
It was found to have an expected level of mortality in three other measures.
Mid-nineteenth-century Americans endured a high rate of infant mortality but expected that most individuals who reached young adulthood would survive at least into middle age.
University Hospitals Birmingham NHS Foundation Trust and Walsall Healthcare NHS Trust were named in the Dr Foster guide as higher than expected on two out of four mortality measures.
The unit was shut after the NHS medical director said data showed mortality figures were higher than expected.
Operations were halted last Thursday after the NHS medical director said data showed mortality figures at the unit were higher than expected.
But CJW Medical Center in Richmond, part of for-profit HCA chain, had stellar numbers: Its six-month mortality rate for heart valve patients was half the expected rate (7.6% versus 13.7%).
"Recent research produced by the CMI (Continuous Mortality Investigation of the Institute of Actuaries) indicates that the rate of mortality improvement is not slowing down as would be expected, " it said.
Giant clinical trials in several African countries in the '90s found the nets reduced malaria cases by 60% and overall child mortality by nearly 20%, better than anyone had expected.
Mortality rates at hospitals in Carlisle and Whitehaven were higher than expected, a report has found.
Mortality rates at two West Midlands health trusts were higher than expected, a report has found.
Mortality rates are calculated by examining how many people would be expected to die, taking into account age and disease profile of the local population.
Mortality rates are calculated by looking at the number of people that would be expected to die when taking into account the age and disease profile of the local population.
In 2009 its mortality rates once again began to rise and, according to the report, were again "significantly above expected" levels by 2011-2012.
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