Xie Li, Li An-Qi, Li Li
Department of Dermatology, West China Hospital, Sichuan University, Chengdu 610041, China.
Sichuan Da Xue Xue Bao Yi Xue Ban. 2019 Dec;50(6):884-890.
To explore the effect of air pollution and meteorological factors on the outpatient visits.
Data of outpatient visits for dermatitis in the West China Hospital of Sichuan University, air pollutants data (SO, NO, PM) and meteorological data (barometric pressure, temperature, relative humidity, wind speed)from January 1, 2011 to December 31, 2015 were collected. Distributed lag nonlinear model was used to analyze the influence of air pollution and meteorological factors on the outpatient visits.
The daily outpatient amountof dermatitis was positively correlated with PM and wind speed, and negatively correlated with SO and temperature. Univariate analysis showed that therelative risk of daily outpatient visits for a 10 μg/m increment in SO and NO were 1.003 (95%: 1.002-1.004) and 1.002 (95%:1.001-1.002) respectively. And the relative risk of daily outpatient visits for a 10% increment in relative humidity was 0.996 (95%:0.994-0.997).Multi-pollutant models indicated that air pollutant concentrations were significantly associated with the daily outpatient amount of dermatitis. Distributed lag models showed that the effects of SO, NO and PM on the daily outpatient amount of dermatitis were mainly observed on the day of exposure. Relative humidity had negative effect on the daily outpatient amount of dermatitis on the day of exposure, in Lag2 days and in Lag4 days.
Air pollutants may be a risk factor for dermatitis, and relative humidity can reduce the risk of dermatitis.
探讨空气污染和气象因素对门诊就诊量的影响。
收集四川大学华西医院2011年1月1日至2015年12月31日期间皮炎门诊就诊数据、空气污染物数据（二氧化硫、二氧化氮、颗粒物）和气象数据（气压、温度、相对湿度、风速）。采用分布滞后非线性模型分析空气污染和气象因素对门诊就诊量的影响。
皮炎每日门诊量与颗粒物及风速呈正相关，与二氧化硫和温度呈负相关。单因素分析显示，二氧化硫和二氧化氮每增加10μg/m³，每日门诊就诊的相对风险分别为1.003（95%：1.002 - 1.004）和1.002（95%：1.001 - 1.002）。相对湿度每增加10%，每日门诊就诊的相对风险为0.996（95%：0.994 - 0.997）。多污染物模型表明，空气污染物浓度与皮炎每日门诊量显著相关。分布滞后模型显示，二氧化硫、二氧化氮和颗粒物对皮炎每日门诊量的影响主要在暴露当天观察到。相对湿度在暴露当天、滞后2天和滞后4天对皮炎每日门诊量有负面影响。
空气污染物可能是皮炎的危险因素，相对湿度可降低皮炎风险。
