Depression sum-scores don’t add up: why analyzing specific depression symptoms is essential

@inproceedings{Fried2015DepressionSD,
  title={Depression sum-scores don’t add up: why analyzing specific depression symptoms is essential},
  author={Eiko I Fried and Randolph M. Nesse},
  booktitle={BMC medicine},
  year={2015}
}
Most measures of depression severity are based on the number of reported symptoms, and threshold scores are often used to classify individuals as healthy or depressed. This method--and research results based on it--are valid if depression is a single condition, and all symptoms are equally good severity indicators. Here, we review a host of studies documenting that specific depressive symptoms like sad mood, insomnia, concentration problems, and suicidal ideation are distinct phenomena that… CONTINUE READING