Even when a screening study has demonstrated a mortality reduction, the degree of pre-testing and contamination is of importance as it can dilute the "true" effect of screening. Our object was to describe the level of pre-testing and contamination in the Göteborg-1 prostate cancer (PC) screening trial.

中文翻译：

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Göteborg-1 随机、基于人群的前列腺癌筛查试验中的前列腺特异性抗原 (PSA) 和活检污染。

即使筛查研究表明死亡率降低，预检和污染的程度也很重要，因为它可以稀释筛查的“真实”效果。我们的目的是描述 Göteborg-1 前列腺癌 (PC) 筛查试验中的预检和污染水平。