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- Title
Concordancia interlaboratorios en la cuantificación de plomo en la sangre.
- Authors
Juárez-Pérez, Cuauhtémoc Arturo; Zempoalteca-Angulo, Yuliana Fabiola; Haro-García, Luis Cuauhtémoc; Mercado-García, Adriana; Jiménez-Ramírez, Carmina; Aguilar-Madrid, Guadalupe
- Abstract
Objective: to establish a blood lead quantification correlation from two occupational health laboratories (OHL1V and OHL2DF), and the ABC Hospital (LABC) metals laboratory. Methods: a cross-sectional study was performed in 84 workers from a voltage regulators company, where lead is welded; in 54% (46 of them) a blood sample was taken and analyzed by OHL1V, and in 28.6% (24) by OHL2DF. All samples were analyzed by atomic absorption spectrophotometry. Pearson correlation (r), coefficient of determination (r²), Lin (rho) concordance test, and Bland-Altman plots were calculated. Results: the blood lead mean: LABC was 5.8 ± 2.4 µg/dL vs. OHL2DF of 4.4 ± 3.6 µg/dL (r = 0.25 [p = 0.24], r² = 0.06 [p = 0.24], and rho = 0.21 [p = 0.21]). And with LABC, 6.75 ± 3.3 µg/dL vs. OHL1V 5.6 ± 2.9 mg/dL (r = 0.91 [p < 0.001], r² = 0.83 [p < 0001], and rho = 0.85 [p < 0.001]). Conclusions: agreement between LABC and OHL1V was poor (< 0.90), and with OHL2DF was null. An occupational health laboratory certification is needed in order to have reliable biological exposure index measurements in lead occupational exposure.
- Subjects
BLOOD testing; LEAD toxicology; INDUSTRIAL hygiene; ATOMIC absorption spectroscopy; CROSS-sectional method; MEDICAL laboratories
- Publication
Revista Medica del IMSS, 2014, Vol 52, Issue 1, p28
- ISSN
0443-5117
- Publication type
Article