Depression

Depression

https://patient.info/doctor/patient-health-questionnaire-phq-9

Patient Health Questionnaire (PHQ-9)

(Scores each of the nine DSM-IV criteria)

Over the last two weeks, how often have you been bothered by any of the following problems?

Little interest or pleasure in doing things?

Feeling down, depressed, or hopeless?

Trouble falling or staying asleep, or sleeping too much?

Feeling tired or having little energy?

Poor appetite or overeating?

Feeling bad about yourself - or that you are a failure or have let yourself or your family down?

Trouble concentrating on things, such as reading the newspaper or watching television?

Moving or speaking so slowly that other people could have noticed?

(Or the opposite - being so fidgety or restless that you have been moving around a lot more than usual)?

Thoughts that you would be better off dead, or of hurting yourself in some way?

Depression Severity

0-4 none

5-9 mild

10-14 moderate

15-19 moderately severe

20-27 severe

All features may be self-reported (subjective account) or observed by others

In assessing for the presence of major depression

Sensitivity of 88%

Picks up 88% of cases, misses (false negative) 12 % of cases

Specificity of 88%

Correctly diagnoses 88% of the time, gives a false positive 12% of the time

https://patient.info/mental-health/depression-leaflet/suicidal-thoughts