PMID- 35142186 OWN - NLM STAT- MEDLINE DCOM- 20220211 LR - 20220211 IS - 1433-6510 (Print) IS - 1433-6510 (Linking) VI - 68 IP - 2 DP - 2022 Feb 1 TI - Verification and Establishment of Reference Intervals for Prothrombin Time and Activated Partial Thromboplastin Time for Children in a Clinical Laboratory. LID - 10.7754/Clin.Lab.2021.210539 [doi] AB - BACKGROUND: Prothrombin time (PT) and activated partial thromboplastin time (aPTT) are routine coagulation tests. The absence of age-dependent reference interval (RI) may lead to abnormal results in children. In this study, we aimed to verify adult-based RIs in children and establish pediatric RIs for PT and aPTT. METHODS: We analyzed PT and aPTT results. Samples from inpatients and outpatients aged 1 - 18 years, considered healthy subjects, were divided into six groups by age. Verification and establishment of RIs were conducted. RESULTS: Applying adult-based RIs to pediatrics was statistically invalid for individuals aged 10 - 18 years for PT and invalid throughout childhood for aPTT. The new RI of PT for individuals aged 10 - 18 years was 11.1 - 14.1 seconds and that of aPTT for individuals aged 1 - 9 years was 28.2 - 46.0 seconds. CONCLUSIONS: Pediatric RIs were higher than adult-based RIs. Using pediatric RI can save time, labor, and costs to make clinical decision. FAU - Lee, Min Young AU - Lee MY FAU - Lee, Woo In AU - Lee WI FAU - Kang, So Young AU - Kang SY FAU - Kim, Myeong Hee AU - Kim MH LA - eng PT - Journal Article PL - Germany TA - Clin Lab JT - Clinical laboratory JID - 9705611 SB - IM MH - Adolescent MH - Adult MH - Blood Coagulation Tests MH - Child MH - Child, Preschool MH - Humans MH - Infant MH - *Laboratories, Clinical MH - Partial Thromboplastin Time MH - Prothrombin Time MH - Reference Values EDAT- 2022/02/11 06:00 MHDA- 2022/02/12 06:00 CRDT- 2022/02/10 06:07 PHST- 2022/02/10 06:07 [entrez] PHST- 2022/02/11 06:00 [pubmed] PHST- 2022/02/12 06:00 [medline] AID - 10.7754/Clin.Lab.2021.210539 [doi] PST - ppublish SO - Clin Lab. 2022 Feb 1;68(2). doi: 10.7754/Clin.Lab.2021.210539.