Fig. 2

Residual ORs from Model 2 of the 28-day mortality for each time period: a 1987–1991, b 1992–1996, c 1997–2001, d 2002–2006, e 2007–2011, f 2012–2016. The white colour indicates a residual OR of 1 (i.e. the observed mortality was equal to the expected mortality of the model). Thus, red colour indicates the observed mortality was above the expected value, and green colour indicates it was below. Data on administrative boundaries were obtained from the Danish Agency for Data Supply and Efficiency