Brachott D, Mosley J W
Bull World Health Organ. 1972;46(4):457-64.
Notifications of morbidity are frequently incomplete but they represent the only practicable way of carrying out large-scale surveillance. Studies of hepatitis in the Central District of Israel offered an opportunity of assessing the reliability of routine data. The regular canvassing of physicians resulted in a 2-3-fold increase in reports of viral hepatitis. Comparisons of rates before and after canvassing with those for an insured population within the Central District indicated that there was an improvement from 37.4% in 1960/61 to 96.2% in 1968/69. None the less, the lower (precanvassing) level of reporting adequately delineated year-to-year fluctuations in morbidity, the seasonal cycle, and age distribution. One consequence of canvassing was a distortion of the secular trend not only for hepatitis but also for some other communicable diseases.
发病情况通报常常不完整，但它们是进行大规模监测的唯一可行方法。对以色列中部地区肝炎的研究提供了一个评估常规数据可靠性的机会。对医生进行定期走访后，病毒性肝炎报告数量增加了2至3倍。将走访前后的发病率与中部地区参保人群的发病率进行比较，结果显示报告率从1960/61年的37.4%提高到了1968/69年的96.2%。尽管如此，较低（走访前）的报告水平仍能充分描绘出发病率的逐年波动、季节性周期和年龄分布。走访的一个后果是不仅肝炎，其他一些传染病的长期趋势也出现了扭曲。
