Table 2 Questionnaire items

demographics

age

0

-

gender

0

-

composition of the household

0

-

type of medical insurance

0

-

education level

0

-

comorbidity

0

-

knee complaints

history, duration, recurrence, consultation previous episode, perceived cause of knee complaint, mechanism of traumatic injury

0

-

pain 11 point numeric rating scale

0, 3, 6, 9, 12

Likert scales have compared favourably to visual analogue scales for children and adults [5-7]

Lysholm knee scale [8]

0, 3, 6, 9, 12

developed for ligament ruptures, sensitive and reliable for meniscus tears, (patellar) chondral disorders [11, 12]

Knee Society Score [29]

0, 12

Intra/interobserver reliabililty poor [30]

- function score (patient questionaire)

0, 12

- function score moderate agreement

- knee score (observer, physical exam)

0, 12

- knee score poor agreement

WOMAC osteoarthritis index [9, 10]

0, 3, 6, 9, 12

validated and reliable for osteoarthritis [10]

pain and difficulty with cycling, running, jumping, squatting, kneeling

0, 3, 6, 9, 12

knee loading

daily activities: employment, volunteer jobs, household chores, study:

0, 3, 6, 9, 12

-

physical exercise/sports participation Frequency, intensity, duration, association with knee complaints

0, 12

-

impact of knee complaint

hindrance during daily activities sick leave from daily activities

0, 3, 6, 9, 12

health related quality of life

SF-36 [31-33]

0, 3, 6, 9, 12

sensitive to change in common orthopaedic diagnoses [14], invalid for adolescents [15]

COOP/WONCA charts [34, 35]

0, 3, 6, 9, 12

valid for adults [34]

treatment

advise given by the GP

0

-

knee medication, dose, frequency, duration, form of administration

0, 3, 6, 9, 12

-

medication for comorbidity

0, 3, 6, 9, 12

-

visits to health care professionals

follow-up

-

operations

follow-up

-

Coping

Tampa Kinesiofobia Scale, (TKS) [36] catastrophizing

0