Article Text
Letter
Use of condoms: pitfalls of retrospective case-note analysis
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In the early 1970s an American researcher suggested that condoms were ineffective in preventing STD transmission.1 Uncertain about the argument, I studied condom use in men attending our GUM department at St Thomas’ Hospital.
I addressed two potentially confounding factors: had condoms been used at every …
Footnotes
Competing interests None declared.
Provenance and peer review Not commissioned; internally peer reviewed.