Objective: To understand the comparability of noise measurement results of various occupational hygiene technical service organizations in Guangdong Province by conducting inter-laboratory comparison of measuring instruments and personnel operation. Methods: In October 2020, the instrument comparison and personnel comparison among 91 occupational hygiene technical service organizations engaged in noise measurement in Guangdong Province were carried out in the form of fixed-point measurement and simulated workplace measurement, and the results were analyzed and evaluated by using the robust z-ratio score. Results: In the instrument comparison, 6 organizations had 1 or 2 outliers in their z-ratio scores, 2 organizations had 2 problematic values in their z-ratio scores, and a total of 8 organizations (accounting for 8.8%) were judged as unqualified; A total of 83 organizations (accounting for 91.2%) with satisfactory z-ratio scores or only one problematic value were judged as qualified. In the personnel comparison, there were 11 organizations with 1 or 2 outliers in the z-ratio score, and 1 organization with 2 problematic values in the z-ratio score. A total of 12 organizations (13.2%) were judged as unqualified and 79 organizations (accounting for 86.8%) with satisfactory z-ratio scores or only one problematic value were judged as qualified. Through comprehensive judgment, 20 organizations (22.0%) were judged as unqualified, and 71 organizations (78.0%) were judged as qualified. There was no statistically significant difference in the qualified rates of instrument comparison results, personnel comparison results and comprehensive evaluation results of non-private organizations and private organizations (P>0.05). There was no significant difference in the qualified rates of instrument comparison results and comprehensive evaluation results of qualified organizations and unqualified organizations (P>0.05), there was significant difference in the qualified rate of personnel comparison results (P<0.05) . Conclusion: The noise measurement results of some occupational health technical service organizations in Guangdong Province are generally comparable. To carry out inter-laboratory comparison of noise instrument performance and personnel operation ability of occupational hygiene technical service organizations, can comprehensively evaluate the testing process of each organization and find out the problems existing in each organization.
目的： 通过开展测量仪器及人员操作的实验室间比对，了解广东省各机构噪声测量结果的可比性。 方法： 于2020年10月，以定点测量及模拟工作场所测量两种形式开展广东省从事噪声检测及监测的91家机构实验室间仪器比对及人员比对，采用稳健z比分数对结果进行分析评估。 结果： 仪器比对中，有6家机构z比分数出现1个或2个离群值，2家机构z比分数出现2个有问题值，共8家（占8.8%）判定为不合格；83家（占91.2%）机构z比分数满意或只出现1个有问题值，判定为合格。人员比对中，有11家机构z比分数出现1个或2个离群值，1家机构z比分数出现2个有问题值，共12家（占13.2%）判定为不合格；79家（占86.8%）机构z比分数满意或只出现1个有问题值，判定为合格。综合判定，共20家（占22.0%）判定为不合格，71家（占78.0%）判定为合格。非民营机构与民营机构仪器比对结果、人员比对结果及综合评定结果合格率差异均无统计学意义（P>0.05）。有资质机构和无资质机构人员比对结果合格率差异有统计学意义（P<0.05），仪器比对结果及综合评定结果合格率差异均无统计学意义（P>0.05）。 结论： 广东省部分机构噪声测量结果可比性一般，开展机构噪声仪器性能及人员操作能力的实验室间比对，可对各机构检测过程进行全面评估，发现各机构存在的问题。.
Keywords: Inter-laboratory comparison; Noise; Occupational health technical service organization; z-score.