Table 2. Comparison between the low back pain and knee pain groups in quality of life.

QOL	Low back pain	Knee pain
Daily activity (points)	5.00 (0.00)	5.00 (0.00)
Health (points)	2.00 (2.00)	2.50 (1.00)
Human support (points)	3.00 (0.00)	3.00 (0.00)
Economic state (points)	2.00 (0.00)	2.00 (1.00)
Depression (points)	1.00 (2.00)	2.00 (2.00)
Positive mental attitude (points)	3.00 (1.00)	3.00 (1.00)

QOL for knee pain was all 5 for “daily activity” and all 3 for “satisfaction with human support”. Mann–Whitney U test.

Median (interquartile range). QOL: quality of life.