Nilson Finn, Bonander Carl, Andersson Ragnar
Division of Risk Management, Department of Environmental and Life Sciences, Karlstad University, Karlstad, Sweden.
Inj Prev. 2015 Jun;21(3):189-94. doi: 10.1136/injuryprev-2014-041337. Epub 2014 Oct 24.
Revisions of the International Classification of Diseases (ICD) have previously been shown to cause dramatic effects with regard to injury mortality data when implemented. However, limited knowledge exists on the effects on the coding of external causes of injury morbidity, despite this being an important aspect with regard to injury prevention.
Hospitalised injuries in Sweden were studied using time series intervention analysis to observe the effect of the ICD change from ICD-9 to ICD-10 in 1997 on external cause coding.
The results would suggest considerable coding issues with a large spike in the proportion of injury admissions registered without an external cause code in 1997, with continuing, although gradually diminishing, problems up to 2002. The coding change seems to have had an immediate effect on all external cause of injury categories, although the categories that were not directly convertible from ICD-9 to ICD-10 were seemingly more greatly affected.
The study illustrates the potential issues associated with changes between ICD revisions and the importance of data quality control both during surveillance and collection of data, but also when presenting injury trends across ICD versions.
先前的研究表明，国际疾病分类（ICD）的修订在实施时会对伤害死亡率数据产生显著影响。然而，尽管伤害发病率的外部原因编码对于伤害预防而言是一个重要方面，但关于ICD修订对其编码的影响，人们了解得还很有限。
采用时间序列干预分析方法，对瑞典住院伤害情况进行研究，以观察1997年从ICD - 9转换为ICD - 10这一ICD变化对外部原因编码的影响。
结果表明存在相当多的编码问题，1997年无外部原因编码的伤害入院比例大幅飙升，直至2002年问题仍持续存在，不过逐渐有所减少。编码变化似乎对所有伤害外部原因类别都立即产生了影响，尽管那些无法直接从ICD - 9转换为ICD - 10的类别受到的影响似乎更大。
该研究说明了ICD版本修订之间变化所带来的潜在问题，以及在数据监测和收集过程中，乃至呈现不同ICD版本间伤害趋势时，数据质量控制的重要性。
