Martínez Ferrando R, Almar Marques E, Mateos Ramos A, Navarro Honrubia C
Delegación Provincial de Sanidad, Albacete.
Aten Primaria. 1995 May 15;15(8):506-8.
The aim was to study the reliability of the available data, stemming from the concordance between two different observers' measurement of the level of free residual chlorine.
An observational, crossover study, using measurements of the level of free residual chlorine repeated on the same day by two different observers.
Health Area of Albacete.
176 double measurements of chlorine, carried out during the study period in 69 networks distributing different waters.
Concordance between observers on the absence or presence of chlorination was low (I.Kappa = 0.261), showing a bias in favour of the presence of chlorination in the measurements made by local technicians (McNemar p < 0.01). Applying a logistic regression model, it was observed that the risk of disagreement was as much as 8.5 times greater when chlorine measurement required the local technician to travel.
We concluded that the data available was of questionable value and that it would be useful to put forward some new proposals to improve the supervision of the network.
旨在研究现有数据的可靠性，这些数据源于两位不同观察者对游离余氯水平测量结果的一致性。
一项观察性交叉研究，采用两位不同观察者在同一天对游离余氯水平进行重复测量。
阿尔巴塞特健康区。
在研究期间，对69个不同供水网络进行了176次氯含量的双重测量。
观察者之间关于是否存在氯化的一致性较低（卡帕值=0.261），表明当地技术人员的测量结果存在有利于氯化存在的偏差（麦克尼马尔检验p<0.01）。应用逻辑回归模型观察到，当氯测量需要当地技术人员前往时，不一致的风险高达8.5倍。
我们得出结论，现有数据的价值存疑，提出一些新的建议以改善对供水网络的监管将是有益的。
