Table 1.

Mean, median and p-values determined by the Wilcoxon signed rank test for the different cytokines in cervical mucus samples that were either refrigerated or frozen

Cytokines	Difference between Frozen and Refrigerated samplesa		Significance (p-value)
	Mean value	Median value
IL-1β	−298.45	−25.02	0.01
IL-2	−0.32	0.0	0.89
IL-4	−12.93	−3.5	0.36
IL-6	391.63	18.64	0.31
IL-8	−359.38	−82.91	0.29
IL-10	−2.20	−0.0	0.85
IL-12	−0.47	0.0	0.94
IFN-γ	−13.060	−4.68	0.03
TNF-α	−43.01	−15.36	0.02
GM-CSF	−16.35	−1.86	0.30

^aThe difference in cytokine levels between refrigerated and frozen samples is considered the variable in Wilcoxon signed rank test.