The inhibition indices were estimated for stone-forming and
normal men and, as shown in Figure 5, the difference between
the two groups is small but statistically significant. This differs
slightly from our previously presented results (4) where the
difference between stone formers and normal subjects did not
reach statistical significance. In both stone-formers and
normal subjects, there was a wide range of values; with a rapid
method for assessing the inhibiting activity we believe that
risk of stone-formation by an individual patient can be more
accurately evaluated.