Letters to the Editor
Re: A Case–Control Study on Psychological Symptoms in Sleep Apnea-Hypopnea Syndrome (SAHS)
Dear Editor:
I write to notify you of some rather strange results in the above-noted paper, published in the June 2003 issue of your journal (1).
Table 3 presents results from the Symptom Checklist-90. The General Severity Index (GSI) is, as noted by the authors, the mean of the responses on all 90 items, which are answered on a 0-to-4 Likert scale. On inspection, however, it appears that the tabulated GSI values in Table 3 are obviously too high, and as the mean GSI for the SAHS patients is stated as 5.25 (SD 4.94), there are definitely errors in the table.
Reference
1. Yue W, Hao W, Liu P, Liu T, Ni M, Guo Q. A case–control study on psychological symptoms in sleep apnea-hypopnea syndrome. Can J Psychiatry 2003;48:318–223.
Jan Ivanouw, PhD
Copenhagen, Denmark
|
