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Table 1 Preanalytical variables included in the Standard PREanalytical Code (SPREC), applied to urine samples

From: Isolation and characterization of urine microvesicles from prostate cancer patients: different approaches, different visions

Sample ID Type of sample SPREC codea
127 PCa patient URN-PIX-D-D-N-N-J
129 PCa patient URN-PIX-D-D-N-N-J
132 PCa patient URN-PIX-A-D-N-N-J
144 PCa patient URN-PIX-B-D-N-N-J
146 PCa patient URN-PIX-B-D-N-N-J
148 PCa patient URN-PIX-B-D-N-N-J
161 HDs URN-PIX-A-D-N-N-J
163 HDs URN-PIX-A-D-N-N-J
164 HDs URN-PIX-A-D-N-N-J
167 HDs URN-PIX-A-D-N-N-J
  1. aEach biospecimen is assigned a seven-element-long code that corresponds to seven preanalytical variables. First code element: type of sample (URN: urine). Second code element: type of primary container (PIX: with Protease inhibitors). Third code element: precentrifugation (A: RT < 2 h, B: 3–7 °C < 2 h, D: 3–7 °C 2–4 h). Fourth code element: centrifugation (D: 3–7 °C 10 min < 3000 g with braking). Fifth code element: second centrifugation (N: No centrifugation). Sixth code element: postcentrifugation (N: Not applicable). Seventh code element: storage condition [J: PP (Poly propylene) tube ≥ 5 mL (− 85) to (− 60) °C. If the preanalytical option used is unknown or inconstant, the letter “X” is used. If the preanalytical option used is known but does not correspond to any of the standard options, the letter “Z” is used. (RT: room temperature 18–25 °C) [25]