Table 1.

Questions on ambulatory ability, functional status, knee pain and other joint pain

Domain	Questions
Ambulatory ability	Do you use a walking device? (without an assistive device, one cane or walker)
	How much do you walk in a day? (1: almost no walking, 2: walking in only one room, 3: walking mainly in the house, 4: walking outside, 5: walking over 1 km)
Functional status	Can you put on socks while standing?
	Can you climb up and down stairs?
	Can you stand up from a chair without using your arms?
	Are you very worried about falling?
	Do you have a regular exercise routine?
Knee pain	Do you have stiffness in your knees on a regular basis?
	Do you have knee pain while walking?
	Do you have knee pain while climbing up or down stairs?
	Do you have knee pain while standing up from a chair?
	Do you restrict from joining social activities due to knee pain in your daily life?
	Can you bend your knees in a sitting position? (1: excellent, 2: good, 3: average, 4: poor, 5: bad)
Other joint pain	Do you have joint pain in any other joints besides the knees?