To the Editor: The report by Giovannucci et al. (May 21 issue)* of an apparent increase in the risk of lung cancer after vasectomy conspicuously omits data on the smoking habits of the patients' wives. Since nurses unfortunately seem to have a poor record of smoking cessation, it would be appropriate in this very large study to analyze the effects of the spouses' smoking habits. It would also be of interest to know whether there was any attempt to examine the accuracy of the diagnosis of adenocarcinoma as compared with squamous-cell carcinoma. It would take only a few misclassified metastatic…

Original languageEnglish
Pages (from-to)1034
Number of pages1
JournalNew England Journal of Medicine
Issue number14
StatePublished - Oct 1 1992


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