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. Author manuscript; available in PMC: 2009 Aug 1.
Published in final edited form as: J Virol Methods. 2008 Jun 24;151(2):298–300. doi: 10.1016/j.jviromet.2008.05.017

Table 2.

A comparison of the HPV genotypes detected in hybrid capture 2 (hc2)-positive specimens stored frozen at pH 12–13 for 6 months, 4 months, and 2.5 months (n = 143 for each time point). The results were compared to hc2-positives specimens stored at pH 6–7 for one month (n = 142) (“Control”).

Storage Time at pH 12–13

6 Months 4 Months 2.5 Months Control p ptrend
HPV6 1.4% 4.9% 1.4% 0.7% 0.1 0.3
HPV11 0.7% 0.0% 0.0% 1.4% 0.2 0.4
HPV16 22.4% 23.1% 11.2% 21.1% 0.03 0.3
HPV18 14.0% 8.4% 8.4% 5.6% 0.1 0.02
HPV26 0.0% 0.0% 0.0% 0.0% n/a n/a
HPV31 7.7% 9.8% 10.5% 12.0% 0.7 0.2
HPV33 2.8% 1.4% 4.9% 3.5% 0.4 0.4
HPV35 4.2% 5.6% 7.0% 2.8% 0.4 0.7
HPV39 11.2% 7.7% 6.3% 9.2% 0.5 0.5
HPV45 6.3% 7.0% 6.3% 8.5% 0.9 0.5
HPV51 4.9% 5.6% 9.8% 9.9% 0.2 0.05
HPV52 12.6% 11.2% 16.8% 11.3% 0.5 0.9
HPV53 7.0% 2.1% 7.0% 4.9% 0.2 0.9
HPV56 14.0% 11.2% 9.1% 11.3% 0.8 0.5
HPV58 7.0% 6.3% 7.0% 9.2% 0.8 0.5
HPV59 5.6% 5.6% 4.9% 3.5% 0.8 0.4
HPV66 7.7% 9.8% 6.3% 4.9% 0.5 0.2
HPV68 13.3% 11.9% 10.5% 12.7% 0.9 0.8
HPV73 3.5% 2.8% 2.1% 0.7% 0.5 0.1
HPV82 2.8% 0.7% 0.7% 2.1% 0.4 0.7