1 Sol and Margaret Berger Department of Urology, Beth Israel Medical Center , New York, New York.
J Endourol. 2014 May;28(5):599-604. doi: 10.1089/end.2013.0680. Epub 2014 Jan 29.
Nephrolithiasis in the United States has been on the rise during the past several decades. Temperature has been shown to directly correlate with increased stone disease. We examine the association between climactic factors and monthly urolithiasis presentation rates for 6 years at a single institution in New York City.
Emergency department (ED) data on patient visitations were collected along with patient demographics. Meteorological data were collected using the website "Weather Underground" ( www.wunderground.com ). Average monthly temperature, dew point, precipitation, and sea level pressure were obtained and relative humidity was calculated using the dew point. Monthly urolithiasis visitations and the correlation of atmospheric factors were analyzed using an autoregressive integrated moving average (ARIMA) model.
The total number of renal colic visits to the hospital's ED from January 2007 through December 2012 tallied 3647 visits. The lowest average monthly rate per 1000 ED visits occurred in the month of February (28.8) and the highest in the month of August (43.8). There was a strong correlation between monthly presentation rate and temperature (P<0.01) and relative humidity (P=0.06) but no correlation with precipitation and sea level pressure. On multivariate ARIMA analysis, only average monthly temperature was significantly associated with monthly urinary calculi presentation rate among all comers (P<0.01). The crude correlations held true for both sexes with respect to temperature but not for females in regard to relative humidity. The age groups of 21 to 44 and 45 to 64 had a rate correlation with temperature and all races correlated with temperature, but only Caucasians had a weak correlation with relative humidity.
This is the first study examining the role of climate on stone presentation rate in a large city above the Southern "stone belt" states. Temperature has a strong correlation with calculi presentation rate, and relative humidity has a trend toward overall calculi presentation rate.
在过去几十年中，美国的肾结石发病率一直在上升。已有研究表明，温度与结石病的增加直接相关。我们在纽约市的一家医疗机构对 6 年来的气候因素与每月尿路结石就诊率之间的关联进行了研究。
收集了急诊科（ED）患者就诊数据和患者人口统计学数据。气象数据使用网站“天气地下”（www.wunderground.com）收集。获得平均每月温度、露点、降水和海平面气压，并使用露点计算相对湿度。使用自回归积分移动平均（ARIMA）模型分析每月尿路结石就诊次数与大气因素的相关性。
2007 年 1 月至 2012 年 12 月期间，医院急诊科肾绞痛就诊总人数为 3647 人。每月每 1000 次 ED 就诊的平均就诊率最低月份为 2 月（28.8），最高月份为 8 月（43.8）。每月就诊率与温度（P<0.01）和相对湿度（P=0.06）呈强相关，但与降水和海平面气压无相关性。多元 ARIMA 分析显示，在所有就诊者中，只有平均每月温度与每月尿路结石就诊率显著相关（P<0.01）。对于男性和女性，温度与就诊率均呈正相关，但对于女性，相对湿度与就诊率无相关性。21 至 44 岁和 45 至 64 岁年龄组与温度呈正相关，所有种族均与温度呈正相关，但只有白种人与相对湿度呈弱相关。
这是第一项研究，探讨了在南方“结石带”州以上的大城市中气候对结石就诊率的影响。温度与结石就诊率有很强的相关性，而相对湿度与结石就诊率有一定的趋势。
