Table 2 Item statistics for PHQ-9 (major depression disorder)
From: An arabic translation, reliability, and validation of Patient Health Questionnaire in a Saudi sample
PHQ-9 items | Mean | Std. deviation | Corrected item-total correlation | Cronbach’s alpha if item deleted | Change in Cronbach’s alpha if item deleted |
|---|---|---|---|---|---|
Little interest or pleasure in doing things | 1.08 | 0.843 | 0.654 | 0.835 | −0.022 |
Feeling down, depressed, or hopeless | 0.98 | 0.853 | 0.698 | 0.831 | −0.026 |
Trouble falling or staying asleep, or sleeping too | 1.27 | 1.042 | 0.558 | 0.846 | −0.011 |
Feeling tired or having little energy | 1.33 | 0.953 | 0.674 | 0.832 | −0.025 |
Poor appetite or overeating | 0.99 | 1.014 | 0.577 | 0.843 | −0.022 |
Feeling bad about yourself—or that you are a failure or have let yourself or family down | 0.77 | 0.951 | 0.626 | 0.838 | −0.009 |
Trouble concentrating on things, such as reading the newspaper or watching TV | 0.67 | 0.864 | 0.534 | 0.847 | −0.010 |
Moving or speaking so slowly that other people could have or the opposite? | 0.45 | 0.789 | 0.548 | 0.845 | −0.012 |
Thoughts that you would be better off dead or of hurting | 0.16 | 0.543 | 0.378 | 0.859 | 0.002 |
Total | 7.71 | 5.433 | 0.400 | 0.857 | 0.000 |