Table 2.

P-element induced wimpy testis (PIWI) RNA-823 (piR-823) expression in colorectal cancer cases (CRC) and control subjects.

Parameter	piR-823 Level	p Value
Serum of healthy control	1.0 ± 0.2	<0.001 *
Serum of CRC cases	6.2 ± 2.3
Adjacent normal tissues of CRC cases	1.0 ± 0.4	<0.001 #
Tumor tissues of CRC cases	3.4 ± 1.9

piR-823 level is in fold change relative to control, statistically highly significant difference (p ≤ 0.001), p-value for t test, * when serum of CRC cases compared to control, and # when tumor tissue compared to normal tissues.