Key points from article :
1 in 5 of the extra deaths in 2014-15 may be attributable being stuck in hospital.
Older patients more vulnerabile to hospital-acquired infections such as C difficile, pneumonia and MRSA.
Increased frailty and serious muscle wastage due to lack of physical activity can undermine health.
Also, over 500,000 patients affected by exit block each year in the UK.
The study was published in the Journal of Epidemiology and Community Health.
