Smith M S
Medical Centre, Rosyth Royal Dockyard, Fife, UK.
Occup Med (Lond). 1995 Feb;45(1):40-4. doi: 10.1093/occmed/45.1.40.
Sickness episodes for the male members of the medical and dental branch of the Royal Navy were compared with those for a control group consisting of other male naval ratings over the period 1981-1989. Age-corrected statistical analysis showed the study group to have had a significantly higher (P < 0.001) number of sickness episodes. An estimate of under-reporting was carried out by taking a sample of weekly sick lists and establishing which cases should have been reported and which actually had been reported. In the sample from a naval hospital, 67.8% (120/177) of cases that should have been reported were actually reported. This figure dropped to 46.8% (171/365) for a naval shore establishment. From this information, correction factors were derived and applied to the sickness episode data. The resulting difference in episodes was not statistically significant between groups. When the study group was compared with male NHS workers, both the observed rates and the estimated rates for the study group were much lower than those for the NHS groups. Bias due to under-reporting was probably a major factor in the overall difference originally observed.
对1981年至1989年期间皇家海军医疗和牙科部门男性成员的患病情况与由其他男性海军士兵组成的对照组进行了比较。年龄校正后的统计分析表明，研究组的患病次数显著更高（P < 0.001）。通过抽取每周病假清单样本并确定哪些病例应报告以及哪些实际已报告，对漏报情况进行了估计。在一家海军医院的样本中，应报告的病例中有67.8%（120/177）实际被报告。对于一个海军岸上机构，这一数字降至46.8%（171/365）。根据这些信息，得出校正因子并应用于患病情况数据。两组之间由此产生的患病次数差异无统计学意义。当将研究组与英国国家医疗服务体系（NHS）男性工作人员进行比较时，研究组的观察率和估计率均远低于NHS组。漏报导致的偏差可能是最初观察到的总体差异的一个主要因素。
