TABLE 5

Distribution Histograms of V/Q Ratios Within the 4 PIOPED Categories

% V/QNormal (n = 16)Low (n = 13)Intermediate (n = 45)High (n = 25)
<0.412.2 ± 1.3*13.2 ± 1.213.8 ± 2.714.1 ± 3.0
<0.826.9 ± 7.529.1 ± 6.530.4 ± 6.137.5 ± 9.2*§
0.8–1.263.3 ± 13.062.2 ± 12.159.8 ± 9.341.3 ± 17.4*§
>1.29.8 ± 5.88.7 ± 5.99.8 ± 4.321.3 ± 11.0*§
>1.60.8 ± 1.41.0 ± 1.80.7 ± 1.18.5 ± 8.6*§
First moment0.87 ± 0.020.85 ± 0.020.85 ± 0.020.93 ± 0.12*§
Second moment0.33 ± 0.040.34 ± 0.040.35 ± 0.030.51 ± 0.20*§
  • * Significant difference from intermediate-probability group, by ANOVA.

  • Significant difference from high-probability group, by ANOVA.

  • Significant difference from normal group, by ANOVA.

  • § Significant difference from low-probability group, by ANOVA.