Letters to the Editor
Reply: A Case–Control Study on Psychological Symptoms in
Sleep Apnea-Hypopnea Syndrome (SAHS)
Dear Editor:
It is very kind of Dr Ivanouw to bring to our attention the fact that the data in Table 3 are too high. In fact, the data given for the General Severity Index of the Symptom Checklist-90 (SCL-90) represent the total factorial score, which is the sum of all 9 factorial scores. The total factorial score of the SCL-90 is commonly used to evaluate psychological status in the Chinese population. I apologize for confusing the 2 terms.
Thank you very much for your instruction.
Yue Weihua, MD
Changsha, China
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