Biofilms were studied in 33/34 (97%) CRSwNP, 22/27 (82%) CRSsNP, and 14/25 (56%) controls. The difference in point prevalence between patients with CRSwNP vs CRSsNP (p = 0.042, χ(2) = 4.12), CRSwNP vs Controls (p < 0.001, χ(2) = 15.0), and CRSsNP vs controls (p = 0.047, χ(2) = 3.96) were all significant. Biofilms were found in 43/54 (80%) ethmoid bulla, 39/55 (71%) uncinate process, and 31/50 (62%) middle turbinate. The difference between the ethmoid bulla and the middle turbinate locations (p = 0.047, χ(2) = 3.93) was significant.
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Danielsen et al. (2015) studied this question.
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