Quality Assurance and precision of PIMA.

A. Internal Quality control using manufacturer provided bead standard controls Normal (mean 957, range 670–1244 cells/µl) and Low (mean 192, range 132–252 cells/µl). (Site 1: Urban Laboratory, Site 2: Urban Clinic, Site 3: Rural Laboratory, Site 4: Rural Clinic, Site 5: Rural Clinic). B. QASI External Quality Assurance Panel each sample tested in replicate by a single laboratory technician at the reference laboratory, Central Public Health Laboratory (CPHL). C. Assessment of assay precision using replicates from the same blood sample run in duplicate by a single laboratory technician. n = sample size, B. SD = standard deviation, CV = coefficient of variation, QASI = Quality Assurance Scheme for Immunology (Public Health Agency of Canada). Quality Assurance and precision of PIMA.A. 采用制造商提供的微珠标准质控品开展内部质量控制，设置正常水平质控品（均值957，范围670–1244 细胞/微升）与低水平质控品（均值192，范围132–252 细胞/微升）。检测站点包括：站点1：城市实验室，站点2：城市诊所，站点3：农村实验室，站点4：农村诊所，站点5：农村诊所。 B. 采用QASI（Quality Assurance Scheme for Immunology，加拿大公共卫生局免疫学质量评估计划）外部质量评估质控面板，由参考实验室——中央公共卫生实验室（Central Public Health Laboratory, CPHL）的单名实验室技术员对每份样本进行重复检测。 C. 采用同一份血液样本的重复分装样本开展检测精密度评估，由单名实验室技术员进行一式两份平行检测。 注：n代表样本量；SD为标准差（standard deviation），CV为变异系数（coefficient of variation）；QASI为加拿大公共卫生局免疫学质量评估计划。本研究旨在评估PIMA的质量保证与检测精密度。