Fig. 2From: Development of a metric for tracking and comparing population health based on the minimal generic set of domains of functioning and healthResults on concurrent validity – nonlinear effect of age. The nonlinear effect of age (solid line) and 95 % confidence intervals (dashed lines) resulting from the linear additive model predicting the value of the health metric for wave-4 data. As there are only a small number of observations below the age of 50, there is a lot of uncertainty in the estimation in this rangeBack to article page