Table 4. Within-group comparison of detected and undetected miRNAs.
| Storage condition | miRNAs |
- 80°C, N (%) N = 179 |
RT 24h, N (%) N = 179 |
24h 4°C, N (%) N = 179 |
χ2 Test | P |
|---|---|---|---|---|---|---|
| K2EDTA | detected | 96 (54) | 136 (76) | 159 (89) | 57.36 | < 0.001 |
| undetected | 83 (46) | 43 (24) | 20 (11) | |||
| PPP | detected | 103 (58) | 73 (41) | 75 (42) | 12.63 | 0.002 |
| undetected | 76 (42) | 106 (59) | 104 (58) | |||
| PPT | detected | 161 (90) | 155 (87) | 157 (88) | 0.99 | 0.608 |
| undetected | 18 (10) | 24 (13) | 22 (12) | |||
| Pearson’s Chi-Square test with Yates’ continuity correction was performed for detected and undetected miRNAs from samples collected in K2EDTA, PPP, and PPT among different storage conditions (immediately stored at - 80°C, stored for 24h at RT, and stored for 24h at 4°C). P < 0.05 was considered statistically significant. RT – room temperature. K2EDTA - dipotassium ethylendiaminetetraacetate tubes. PPT – plasma preparation tubes. PPP- platelet-poor plasma. | ||||||