ROS, MAP, MARS, Clinical Core, LATC
Depressive symptoms are assessed with a modified, 10-item version of the Center for Epidemiologic Studies Depression scale (CES-D)*. Participants are asked whether or not they experienced each of ten symptoms much of the time in the past week. The score is the total number of symptoms experienced. Items 4 and 7 are reverse coded so the response is consistent with depressive symptom =1.
Participants are presented with the following items:
|Item no.||Item||Calc||Item no. in 20-item CES-D*|
|1||I felt depressed.||Yes=1||6|
|2||I felt that everything I did was an effort.||Yes=1||7|
|3||My sleep was restless.||Yes=1||11|
|4||I was happy.||No=1||12|
|5||I felt lonely.||Yes=1||14|
|6||People were unfriendly.||Yes=1||15|
|7||I enjoyed life.||No=1||16|
|8||I felt sad.||Yes=1||18|
|9||I felt that people disliked me.||Yes=1||19|
|10||I could not get going.||Yes=1||20|
Note on missing data: The score is rescaled to be out of 10 by averaging the non-missing item values and multiplying by 10. For example, if only 8 questions are answered, and the sum is 6, then 6/8 = 0.75, multiplied by 10 results in a score of 7.5. This is only done if less than 5 items are missing.
*Reference for full 20-item CES-D: Radloff LS: The CES-D Scale: a self-report depression scale for research in the general population. Applied Psychological Measurement 1:385-401, 1977.