Table 3.
Description of Coagulation According to Time Between Collection and Centrifugation
| Coagulation | Variable | Nb | Mean (h) | SD | Min | p25 | p50 | p75 | Max |
|---|---|---|---|---|---|---|---|---|---|
| No | Time | 355 | 20.9 | 8.4 | 3.6 | 15.0 | 20.9 | 25.5 | 51.7 |
| Yes | Time | 90 | 22.3 | 7.4 | 5.6 | 18.3 | 22.7 | 26.4 | 42.3 |
| Coefficient | SD | z | Pr (>|z|) | RR | 95% CI | |
|---|---|---|---|---|---|---|
| Constant | −1.960 | 0.312 | −6.291 | <0.001 | ||
| Time (linear relation over 0–20 h interval) | 0.032 | 0.017 | 1.856 | 0.063 | 1.03 | [1; 1.07] |
| District Seine-Saint-Denis and no syringe | Ref | |||||
| District Seine-Saint-Denis and syringe | 1.026 | 0.328 | 3.129 | 0.002 | 2.79 | [1.47; 5.31] |
| District Rhône-Alpes and no syringe | 0.236 | 0.333 | 0.708 | 0.479 | 1.27 | [0.66; 2.43] |
| Maternity status: public | Ref | |||||
| Maternity status: private | 0.392 | 0.186 | 2.102 | 0.036 | 1.48 | [1.03; 2.13] |
RR, relative risk.