Comparison of automated determination of phosphatidylethanol (PEth) in dried blood spots (DBS) with previous manual processing and testing.

Comparison of automated determination of phosphatidylethanol (PEth) in dried blood spots (DBS) with previous manual processing and testing.
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DOI:
10.1016/j.alcohol.2021.11.001
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发表时间:
2022-02
期刊:
影响因子:
2.3
通讯作者:
Hahn, Judith A.
Hahn, Judith A.
中科院分区:
医学4区
文献类型:
--
作者:
Fatch, Robin;Luginbuhl, Marc;Cheng, Debbie M.;Gaugler, Stefan;Emenyonu, Nneka, I;Ngabirano, Christine;Adong, Julian;Muyindike, Winnie R.;Samet, Jeffrey H.;Bryant, Kendall;Hahn, Judith A.

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相似文献

磷脂酰乙醇 (PEth) 是过去 2-3 周内饮酒的敏感且特异的生物标志物。使用干血斑 (DBS) 进行标准手动 PEth 测试是一个多步骤且耗时的过程。一种新颖的自动化处理和测试方法已被开发出来,以减少 DBS 处理和测试时间。我们使用区域纯 PEth 参考材料对随机选择的 DBS 进行了自动化测试,这些 DBS 之前已通过手动方法测试,然后在 -80°C 下保存 3-6 年,以比较结果(PEth 16:0/18:1 同系物)。我们使用文献中找到的类别选择样本进行重新测试,如下:(1)PEth <20 ng/mL; (2) PEth 20–200 纳克/毫升; (3) PEth >200–1000 ng/mL; (4) PEth >1000 纳克/毫升。我们使用加权 kappa 统计量 (n=49 DBS) 计算类别之间的一致性。我们使用类内相关系数 (ICC) 量化连续测量之间的一致性,并使用 Spearman 相关性进一步描述变量之间的关系。自动方法的 PEth 结果中位数为 155 ng/mL(四分位距 [IQR]:1–1312 ng/mL),手动方法的中位 PEth 结果为 98.8 ng/mL(IQR:10.2–625.0 ng/mL)。比较自动 PEth 结果和手动 PEth 结果的加权 kappa 为 0.76(95% 置信区间 (CI):0.66–0.86)。 ICC 为 0.69(95% CI:0.54-0.79),Spearman 相关性为 0.98(95% CI:0.95-0.99)。虽然新方法产生的 PEth 值稍高,但我们发现临床相关 PEth 类别之间具有良好到极好的一致性。使用新参考标准的自动化 DBS 处理和测试是有前景的 PEth 测试方法。
Phosphatidylethanol (PEth) is a sensitive and specific biomarker of alcohol consumption in the prior 2–3 weeks. Standard, manual PEth testing using dried blood spots (DBS) is a multi-step time-consuming process. A novel, automated processing and testing method has been developed to decrease DBS processing and testing time. We conducted automated testing, using regiosimerically pure PEth reference material, on randomly selected DBS which had previously been tested via manual methods and then stored for 3–6 years at at −80°C, to compare the results (PEth 16:0/18:1 homologue). We chose samples for re-testing using categories found in the literature as follows: (1) PEth <20 ng/mL; (2) PEth 20–200 ng/mL; (3) PEth >200–1000 ng/mL; (4) PEth >1000 ng/mL. We calculated agreement between the categories using the weighted kappa statistic (n=49 DBS). We quantified agreement between continuous measures using the intraclass correlation coefficient (ICC), and further described the relationship between variables using Spearman correlation. The median PEth result was 155 ng/mL (interquartile range [IQR]: 1–1312 ng/mL) via automated methods and 98.8 ng/mL (IQR: 10.2–625.0 ng/mL) via manual methods. The weighted kappa comparing the automated to manual PEth results was 0.76 (95% Confidence Interval (CI): 0.66–0.86). The ICC was 0.69 (95% CI: 0.54–0.79), and the Spearman correlation was 0.98 (95% CI: 0.95–0.99). While the new methods yielded somewhat higher PEth values, we found good to excellent agreement between clinically relevant PEth categories. Automated DBS processing and testing using new reference standards are promising methods for PEth testing.
DOI: 10.1097/qai.0000000000001588
发表时间: 2018-02-01
影响因子: 3.6
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发表时间: 2019-08-01
期刊: LANCET HIV
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