[Staging of occupational medicamentosa-like dermatitis due to trichloroethylene]

Objective: To explor staging of the general course of occupational medicamentosa-like dermatitis due to trichloroethylene (OMDT) to better understand the characteristics of OMDT course, and to provide reference for clinical diagnosis and treatment and related studies. Methods: We collected main clinical manifestation and auxiliary examination data during hospitalization to May 2019 from 35 OMDT patients with complete course record who were hospitalized from January 2014 to December 2018. Continuous monitoring indicators with changing trends including main clinical manifestation indicators, peripheral white blood cell counts, liver function indicators such as serum alanine aminotransferase activity, myocardial enzyme indicators such as serum lactate dehydrogenase activity were selected and used with their standardized values to do cluster analysis on time point (week as unit) of the course of each patient. The clustering results combined with changing trends of the indicators were used to determine the stages of course of each patient, and therefore the staging of general course of OMDT was calculated. Positive rates or average levels of the indicators were compared between different stages, and the correlation of duration of each stage was analyzed with physical characteristics, disease characteristics and treatment measures of the patients. Results: General course of OMDT could be divided into acute phase (3.0±1.5) weeks and chronic phase (11.0±4.4) weeks, while chronic phase could be further divided into early period (5.0±3.0) weeks and later period (6.5±3.7) weeks. Compared with chronic phase, clinical manifestation indicators, white blood cell counts (except eosinophil count) , liver function indicators (except total protein and albumin concentration) , and myocardial enzyme indicators were all increased (all P<0.01) , while total protein and albumin concentration decreased (P<0.05 and P<0.01, respectively) in acute phase. Compared with later period of the chronic phase, clinical manifestation indicators (except fever) , white blood cell counts (except lymphocyte count) , liver function indicators (except total protein and albumin concentration) , and creatine kinase isoenzyme activity were all increased (all P<0.01) , while total protein, albumin concentration and creatine kinase activity decreased (all P<0.01) . Duration of acute phase were positively correlated with the time before glucocorticoid treatment (r(spearman)=0.62, P(adjust)<0.01) , and early and later periods of chronic phase were both positively correlated with corresponding duration of glucocorticoid treatment (r(spearman)=0.96, P(adjust)<0.01, r(spearman)=0.91, P(adjust)<0.01, respectively) . Conclusion: For the first time, the study objectively determined stages of general course of OMDT based on combination of multiple indicators, and analyzed characteristics of main indicators in each phase and potential factors related to the duration of each phase.

目的： 探索职业性三氯乙烯药疹样皮炎（occupational medicamentosa-like dermatitis due to trichloroethylene，OMDT）的病程分期，了解该病的病程特点，为临床诊治和相关研究提供参考。 方法： 于2019年6月，采用连续抽样法收集2014年1月至2018年12月深圳市职业病防治院收治且病程记录完整的35名OMDT患者资料，分析其从入院至2019年5月的主要临床表现和辅助检查资料，选择连续监测指标进行分析，包括临床表现指标、外周血白细胞分类计数、血清丙氨酸氨基转移酶活力等肝功能指标、血清乳酸脱氢酶活力等心肌酶指标。根据指标标准化值对研究对象以周为单位的病程时间点进行聚类分析，结合指标变化趋势对所有研究对象进行病程分期；比较各指标在不同病程分期中的阳性率或平均水平，分析患者体质特征、疾病特点和治疗措施与各病程分期时长的相关性。 结果： OMDT患者一般病程可分为急性期（3.0±1.5）周和慢性期（11.0±4.4）周，慢性期又分慢性前期[平均（5.0±3.0）周]和慢性后期[（6.5±3.7）周]。与慢性期患者比较，急性期患者临床表现指标、白细胞分类计数（除嗜酸性粒细胞数）、肝功能指标（除总蛋白和白蛋白浓度）、心肌酶指标均升高，差异有统计学意义（P<0.01），总蛋白、白蛋白浓度降低（P<0.05）。与慢性后期患者比较，慢性前期患者临床表现指标（除发热）、白细胞分类计数（除淋巴细胞数）、肝功能指标（除总蛋白和白蛋白浓度）、肌酸激酶同工酶活性均升高，差异有统计学意义（P<0.01），总蛋白、白蛋白浓度、肌酸激酶活性均降低，差异有统计学意义（P<0.01）。急性期时长与开始使用激素时长呈正相关（r(spearman)=0.62，P(adjust)<0.01），慢性前期时长（r(spearman)=0.96，P(adjust)<0.01）、慢性后期时长（r(spearman)=0.91，P(adjust)<0.01）均与期内使用激素时长呈正相关。 结论： 本研究综合多项客观指标确定了OMDT患者的一般病程分期，并分析了各期主要指标变化特点和病期时长的可能相关因素。.

Keywords: Cluster analysis; Course of disease; Stage of disease; Trichloroethylene.