Table 1

Original and updated versions of the OSTRC-O questionnaire, with changes highlighted in red

The OSTRC-O
Original version (OSTRC-O) Updated version (OSTRC-O2)
Please answer all questions regardless of whether or not you have problems with your knees. Select the alternative that is most appropriate for you, and in the case that you are unsure, try to give an answer as best you can anyway.Please answer all questions regardless of whether or not you have problems in your(insert anatomical location here, eg, knees). Select the alternative that is most appropriate for you, and in the case that you are unsure, try to answer as best you can anyway.
The term ‘knee problems’ refers to pain, ache, stiffness, swelling, instability/giving way, locking or other complaints related to one or both knees.The term ‘(location) problems’ refers to (insert common symptoms or injury consequences here, eg, pain, ache, stiffness, clicking/catching, swelling, instability/giving way, locking)or other complaints related to your (location).
Question 1 Question 1—Participation
Have you had any difficulties participating in normal training and competition due to knee problems during the past week?Have you had any difficulties participating in training and competition due to (location) problems during the past 7 days?
a. Full participation without knee problemsa. Full participation without (location) problems
b. Full participation, but with knee problemsb. Full participation, but with (location) problems
c. Reduced participation due to knee problemsc. Reduced participation due to (location) problems
d. Cannot participate due to knee problemsd. Could not participate due to (location) problems
Question 2 Question 2—Modified training/competition
To what extent have you reduced you training volume due to knee problems during the past week?To what extent have you modified your training or competition due to (location) problems during the past 7 days?
a. No reductiona. No modification
b. To a minor extentb. To a minor extent
c. To a moderate extentc. To a moderate extent
d. To a major extentd. To a major extent
e. Cannot participate at all
Question 3 Question 3—Performance
To what extent have knee problems affected your performance during the past week?To what extent have (location) problems affected your performance during the past 7 days?
a. No effecta. No effect
b. To a minor extentb. To a minor extent
c. To a moderate extentc. To a moderate extent
d. To a major extentd. To a major extent
e. Cannot participate at all
Question 4 Question 4—Pain
To what extent have you experienced knee pain related to your sport during the past week?To what extent have you experienced (location) pain related to your sport during the past 7 days?
a. No paina. No pain
b. Mild painb. Mild pain
c. Moderate painc. Moderate pain
d. Severe paind. Severe pain
  • OSTRC-O, Oslo Sports Trauma Research Center Overuse Injury Questionnaire.