Calculate Chalder Fatigue Scale (CFQ-11) sum score

Calculate sum score of CFQ-11

items need to be recoded first

calculate_cfq11_sum(
  cfq_1,
  cfq_2,
  cfq_3,
  cfq_4,
  cfq_5,
  cfq_6,
  cfq_7,
  cfq_8,
  cfq_9,
  cfq_10,
  cfq_11
)

Arguments

cfq_1

vector for item "Is fatigue a problem for you?"

cfq_2

vector for item "Do you need to rest frequently?."

cfq_3

vector for item "Do you feel tired or sleepy?"

cfq_4

vector for item "Do you have difficulty getting things done?"

cfq_5

vector for item "Do you lack energy?"

cfq_6

vector for item "Do you have less strength in your muscles?"

cfq_7

vector for item "Do you feel weak?"

cfq_8

vector for item "Do you find it difficult to concentrate?"

cfq_9

vector for item "Do you have slips of the tongue when you speak?"

cfq_10

vector for item "Do you find it difficult to think clearly?"

cfq_11

vector for item "How is your memory?"

Value

A numeric vector with sum score of CFQ-11