Unjustified Restrictions on Letters to the Editor

Abstract

I previously criticised the effective "statute of limitations" in several leading general medical journals "whereby authors of papers are immune to disclosure of methodological weaknesses once some arbitrary (short) period has elapsed" [2].Such a time limit discourages post-publication peer review, with potential correspondents deterred by the short and unambiguous deadline.I suggested that journals with such a policy should reconsider.The word limit on that article precluded additional adverse comments on journals' word limits for letters, although they were presented in Table 2 of that article [2].Subsequently, three of the six journals did revise their instructions [3-5], but each imposed tougher restrictions on letters, reducing either the maximum time limit, the maximum length, or both.The strictest current requirements are a two-week limit by The Lancet and a 175-word limit by the New England Journal of Medicine.Editors are seemingly falling over themselves to speed up and shorten letters, but this behaviour is inappropriate for a scientifi c journal.The key characteristic of science is not its infallibility, a quality it clearly does not and cannot have, but its self-correcting ability.The decision by medical editors to stifl e debate is misguided [2,6].A time limit, especially a very short one, signals that speed is more important than content, that convenience takes precedence over science.While it is reasonable to encourage early comments, there should be no time limit on comments aimed at clarifying or criticising study methodology.Likewise, it will often be impossible to explain the subtleties of methodological problems in 400 words, and impossible in only 175.Additional restrictions on the number of authors and references are also questionable.I am disappointed that PLoS Medicine has imposed a time limit of four weeks on correspondence.As explained above, I believe that such a limit is mistaken.

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