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Professor Jarman used NHS data to come to his conclusion.It involved 134 hospital trusts in England, with four not having enough statistics to meet his criteria.Eminent hospital death rates expert Professor Sir Brian Jarman, who helped expose the Mid-Staffordshire hospitals scandal, was behind the analysis.His findings, disputed by the NHS, suggest a 'postcode lottery' of care is consigning hundreds, or even thousands, of patients to an early grave.
Between 20 it recorded 39 per cent less deaths than expected.
And Poole Hospital NHS Foundation Trust saw 35 per cent fewer sepsis deaths than projections estimated, with it claiming 167 lives in three years.
The method Professor Jarman used to make the projections is recommended by the Association of Public Health Observatories.
He revealed the NHS has previously used the internationally recognised system, called Byar’s confidence intervals.
A similar process helped uncover poor care at the Mid Staffordshire trust, which was at the centre of one of the biggest scandals ever to hit the NHS.