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Correspondence| Volume 46, ISSUE 12, P1711, December 15, 1999

The efficacy of lamotrigine in rapid cycling and non–rapid cycling patients with bipolar disorder

      Recently,
      • Bowden C.L.
      • Calabrese J.R.
      • McElroy S.L.
      • Rhodes L.J.
      • Keck Jr, P.E.
      • Cookson J.
      • et al.
      The efficacy of Lamotrigine in rapid cycling and non–rapid cycling patients with bipolar disorder.
      reported an analysis of data from a larger industry-sponsored clinical trial. In this paper the efficacy of lamotrigine as an add-on treatment was compared for rapid cycling and non–rapid cycling bipolars, who are commonly difficult to treat. Unfortunately from this paper it is difficult to come to any conclusion about this comparison with confidence. There is a lack of detail about how the instruments were used, which affects the results; about the number of tests, which will affect significance; and about the dropout pattern, which affects generality.
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      References

        • Bowden C.L.
        • Calabrese J.R.
        • McElroy S.L.
        • Rhodes L.J.
        • Keck Jr, P.E.
        • Cookson J.
        • et al.
        The efficacy of Lamotrigine in rapid cycling and non–rapid cycling patients with bipolar disorder.
        Biol Psychiatry. 1999; 45: 953-958