RESUMEN
OBJECTIVE: To analyze the correlation between vascular endothelia injury factors and occupational hand-arm vibration disease( HAVD). METHODS: A judge sampling method was used to select 23 male patients with HAVD as the HAVD group,61 male workers who exposed to hand-arm vibration without HAVD as the vibration exposure group,64 male workers without hand-arm vibration exposure as the control group. The plasma levels of myosin light chain 2( MLC2),endothelin-1( ET-1) and vinculin( VCL) were detected by enzyme-linked immunosorbent assay. Logistic regression analysis was used to analyze the related indicators of HAVD for building the new multivariable model index Y. The indicators of HAVD were screened and judged by receiver operating characteristic( ROC) curves. RESULTS: There was significant difference in plasma levels of MLC2 among the three groups( P < 0. 05). The levels from high to low was as follows: HAVD group > vibration exposure group > control group. The plasma level of ET-1 in HAVD group was lower than that in the control group( P < 0. 05),but there was no significant difference between vibration exposure group and HAVD group( P > 0. 05). There was no significant difference among the three groups in the plasma level of VCL( P > 0. 05).The logistic regression analysis results showed that after adjusting confounding factors such as age,length of service,smoking,alcohol drinking and subjective symptoms,the higher MLC2 plasma level,the higher risk of HAVD( P < 0. 01),and the lower ET-1 plasma level,the higher risk of HAVD( P < 0. 05). According to ROC curve analysis,the area under the ROC curve( A_Z) value of the plasma levels of MLC2 and ET-1 were 0. 820 and 0. 524,respectively( P < 0. 01). The predictive probability index Y built with MLC2 and ET-1 by logistic regression model was used to judge the A_Z value of HAVD to be 0. 799( P < 0. 01). The A_Z values from high to low was as follows: MLC2 > Y> ET-1( P < 0. 01).CONCLUSION: The plasma levels of MLC2 and ET-1 are correlated with HAVD. The efficacy of MLC2 as a biomarker for screening HAVD is better than that of ET-1. No association was found between VCL and HAVD.