Figure 2.

Association between the volume of the hospital and maintainability among Finnish hip fracture patients in 1998-2001. The x-axis represents the volume of the pooled number of treated hip fracture patients in hospital during 1998-2001 in Finland, and the y-axis contains the four-month risk-adjusted unsuccessful maintainability (death, readmission, or referral to a higher-level hospital). The dots represent hospitals (n = 52). The solid line is the trend from the mean model, the dashed line is the trend from the linear model, and the dotted line is the trend from the spline model. DIC = Deviance Information Criterion