The Effects of Bariatric Surgery Weight Loss on Knee Pain in Patients with Osteoarthritis of the Knee

Table 2

Statistical analysis of KOOS and WOMAC scores comparing values at baseline and 12 months. Values listed are the change in scores over a 12-month period

KOOS and WOMAC scores: baseline to 12-month comparison.
	Mean	Q1	Median	Q3	Signed rank 𝑃 value
WOMAC pain	−5.295	−7.29	−6.25	−4.685	<0.0001
WOMAC stiffness	−2.95	−4.17	−3.645	−2.085	<0.0001
WOMAC physical function	−19.2	−31.775	−20.84	−11.46	<0.0001
KOOS symptoms	11.66	4	12	16	<0.0001
KOOS pain	19.44	7.775	18.89	28.33	<0.0001
KOOS daily living	17.36	7.65	14.12	26.62	<0.0001
KOOS sports	22.43	8	20	32	<0.0001
KOOS quality of life	18.5	10	17.5	27.5	<0.0001

Q1: 1st quartile, Q3: 3rd quartile. For all categories 𝑛=24. Values listed above are measured as differences in WOMAC/KOOS scores subtracted from baseline.