Mur J M, Cavelier C
Scand J Work Environ Health. 1982;8 Suppl 1:24-5.
This communication discusses the possibility of cross-sectional occupational surveys concealing real occupational risks. For example, occupational factors constitute only one of the etiologic determinants of multifactorial diseases. In addition the diversity of industrial processes leads to a dispersion of risks, and it is difficult to avoid sampling biases both for cases and for referents. The conclusion is drawn that only after several surveys, conducted by different groups and under different circumstances, have shown no risk for a certain occupational factor can such results be considered valid.
本通讯讨论了横断面职业调查掩盖实际职业风险的可能性。例如，职业因素只是多因素疾病病因决定因素之一。此外，工业生产过程的多样性导致风险分散，而且病例组和对照组都难以避免抽样偏差。得出的结论是，只有在不同组在不同情况下进行的几次调查均表明某一职业因素无风险之后，这样的结果才能被认为是有效的。
