Calculate Patient Health Questionnaire Depression Scale 9 (PHQ 9) sum score

Calculate sum score of PHQ-9

Patients are asked "Over the last 2 weeks, how often have you been bothered by any of the following problems?"

calculate_phq9_sum(
  phq9_1,
  phq9_2,
  phq9_3,
  phq9_4,
  phq9_5,
  phq9_6,
  phq9_7,
  phq9_8,
  phq9_9
)

Arguments

phq9_1

vector for item "Little interest or pleasure in doing things."

phq9_2

vector for item "Feeling down, depressed, or hopeless."

phq9_3

vector for item "Trouble falling or staying asleep, or sleeping too much."

phq9_4

vector for item "Feeling tired or having little energy."

phq9_5

vector for item "Poor appetite or overeating"

phq9_6

vector for item "Feeling bad about yourself - or that you are a failure or have let yourself or your family down."

phq9_7

vector for item "Trouble concentrating on things, such as reading the newspaper or watching television."

phq9_8

vector for item "Moving or speaking so slowly that other people could have notived. Or the opposite - being so fidgety or restless that you have been moving around a lot more than usual."

phq9_9

vector for item "Thoughts that you would be better off dead, or thoughts of hurting yourself in some way?"

Answers were coded /w levels 0 = "Not at all", 1 = "Several days", 2 = "More than half the days" and 3 = "Nearly every day"

Value

A numeric vector with sum score of phq9