Table 2

Total and human DNA yields (μg/two cytobrushes or μg/one 10-ml mouthwash sample) from phase 2a of the study by method of collection

Method of collectionNSpectrophotometryHybridization
Total DNA yieldA260 nm:A280 nmHuman DNA yield
Median (range)Median (range)Median (range)
Cytobrushes2813.5b (2.0–38.2)1.8 (1.6–2.0)1.6c (0.11–7.7)
Mouthwash2538.7b (11.9–124.2)1.8 (1.7–1.9)16.6c (1.55–140.3)
  • a Samples were collected from women participating in the WHS and extracted by phenol-chloroform.

  • b P < 0.001, cytobrush versus mouthwash, Wilcoxon’s rank-sum test.

  • c P < 0.001, cytobrush versus mouthwash, Wilcoxon’s rank-sum test.