Electronic Letters to:
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eLetters: Electronic letters published:
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Bipolar patients and their relatives - which has the higher NART IQ?.
- James MacCabe (31 August 2005)
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Clarification of IQ result
- Andrew M McIntosh, Lesley K. Harrison, Karen Forrester, Stephen M. Lawrie, Eve C. Johnstone (29 September 2005)
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James MacCabe, MRC Research Fellow Institute of Psychiatry, King's College London
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j.maccabe{at}iop.kcl.ac.uk James MacCabe
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I read the article with great interest, but there appears to be an inconsistency in the results. The authors state that 'Patients with bipolar disorder from families with bipolar disorder had significantly higher NART scores than their unaffected relatives', and the reader is referred to Table 4. In table 4, the mixed-effects ANOVA for NART is shown to be significant, and the significant between-group contracts are then listed. The relevant contrast is listed as "uBPD>BPD". According to the legend, this signifies that RELATIVES from bipolar families performed better than the patients, seemingly contradicting the text. Examination of the means in Table 3 suggests that the text is correct, and that table 4 contains an error. I would be very grateful if the authors could clarify this. |
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Andrew M McIntosh, Senior Lecturer Edinburgh University, Lesley K. Harrison, Karen Forrester, Stephen M. Lawrie, Eve C. Johnstone
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andrew.mcintosh{at}ed.ac.uk Andrew M McIntosh, et al.
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Dr MacCabe is correct in pointing out the inconsistency in table 4. The result is correctly stated in the text and the table shoud read "BPD>uBPD" instead of "uBPD>BPD". We thank Dr McCabe for pointing out this inconsistency. |
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