Figure 3.

The Physical Component Score of the SF-36 Health Status measure, plotted in relation to the age of the respondent. PCD-SS individuals are shown as solid black circles (•) and PCD-SI individuals as open black circles (○). The solid black line (-) is the lowess curve fitted through the data. The dashed black line (- - -) shows the population norm (see text), and the dotted black lines (.....) show one standard deviation above and below the population norm.