In January 2016, Hunt was criticised by stroke doctors for using out-of-date data to show stroke patients were more likely to die if admitted at weekends. They wrote there had been significant improvements since 2004–12, when Hunt's data came from, and new data showed there was "no longer any excess of hospital deaths in patients with stroke admitted at the weekend." Stroke specialist David Curtis said even the outdated statistics did not support Hunt's claims. In February, a leaked internal report by the Department of Health stated the department was unable to prove a link between increased consultant presence, availability of diagnostic tests, and reducing weekend mortality and length of stay. It highlighted the seven-day NHS could cost an additional £900 million each year, required the recruitment of 11,000 more staff including 4,000 doctors and 3,000 nurses, and community and social services could struggle to handle more discharges at the weekend.