Department of Surgical and Perioperative Sciences, Section of Anesthesiology and Intensive Care, Umeå University, Umeå, Sweden.
Accid Anal Prev. 2010 Mar;42(2):778-83. doi: 10.1016/j.aap.2009.11.013. Epub 2009 Dec 31.
The Swedish Parachute Association (SFF) national registry of skydiving injuries is one of the few trauma databases available for research on sport parachuting. The usefulness of this compulsory reporting system may benefit from a description of its base population and an evaluation of its sensitivity and specificity.
Cross-sectional analysis based on data collected through a web-based questionnaire (SKYNET), from all persons renewing a Swedish skydiving license 2008 (n=1049). Sensitivity was measured as the proportion of injury events fulfilling the reporting criterion (injury event requiring care of a physician) that were actually reported, by comparing the injury events reported to the SFF during the skydiving seasons 2006 and 2007 with the injury events retrospectively reported to the web-based questionnaire for the same time period. Specificity was measured as the proportion of false positives in relation to the defined reporting criterion for the same time period. Self-stated bone fractures, shoulder dislocations and cruciate ligament injuries were labeled as non-minor injuries. Factors affecting the likelihood of reporting were evaluated using logistic regression.
The response rate was 100%. The overall sensitivity of the reporting system 2006/2007 was 0.37 (95% confidence interval (CI) 0.24-0.51). With self-stated non-minor injuries as the target for reporting, the sensitivity was 0.67 (95% CI 0.43-0.85). No significant effect on reporting was found for gender, age, license level, years in the sport, total number of jumps or club affiliation. The specificity was 0.91 (95% CI 0.83-0.95). Descriptive statistics of the Swedish skydiving population show several gender differences.
The low sensitivity will yield false low incidence calculations, but as there is no evidence for differential underreporting, risk comparisons related to the candidate predictor variables appear reasonably valid. The false positive reporting warrants assortment of incoming data and a clarification of the reporting criteria. Attitudes to reporting may be of value to study, to understand the drivers and constraints for achieving a more complete notification of skydiving injuries.
瑞典跳伞协会（SFF）的跳伞伤害国家登记处是为数不多的可用于研究运动跳伞创伤的数据库之一。这种强制性报告系统的有用性可能受益于对其基础人群的描述，以及对其敏感性和特异性的评估。
基于通过基于网络的问卷（SKYNET）从 2008 年更新瑞典跳伞执照的所有人中收集的数据进行的横断面分析（n=1049）。敏感性通过比较 2006 年和 2007 年跳伞季节期间向 SFF 报告的伤害事件与同一时期回顾性报告给网络问卷的伤害事件来衡量，以报告标准（需要医生治疗的伤害事件）实际报告的伤害事件的比例来衡量。特异性通过与同一时期报告标准相关的假阳性比例来衡量。自述的骨折、肩脱位和前十字韧带损伤被标记为非小伤。使用逻辑回归评估影响报告可能性的因素。
回复率为 100%。2006/2007 年报告系统的总体敏感性为 0.37（95%置信区间[CI]0.24-0.51）。以自述的非小伤为报告目标，敏感性为 0.67（95%CI0.43-0.85）。性别、年龄、执照级别、运动年限、总跳伞次数或俱乐部隶属关系对报告无显著影响。特异性为 0.91（95%CI0.83-0.95）。瑞典跳伞人群的描述性统计数据显示出一些性别差异。
低敏感性会导致虚假的低发病率计算，但由于没有证据表明报告存在差异，因此与候选预测变量相关的风险比较似乎是合理有效的。虚假阳性报告需要对传入数据进行分类，并澄清报告标准。报告态度可能具有研究价值，有助于了解报告跳伞伤害的驱动力和限制因素。
