Figure 1

The number of low isotypes was plotted against the proportion of each group having these deficiencies. Low isotypes (n = 7) were identified in 3 CRSsNP and 1 NPother subject. Fewer nasal polyp subjects had low isotypes compared to the nonpolypoid pair of groups. This was demonstrated by the 95% confidence intervals at the midpoint of these curves (bars with error bars at 20%). Polyp and nonpolyp confidence intervals did not overlap. Most of the subjects had no humoral immune deficits (zero low isotypes, not depicted).