Minimal clinically important difference for improvement in six-minute walk test in persons with knee osteoarthritis after total knee arthroplasty

Table 1 Baseline characteristics of participants (n = 278)

Characteristic
Pre-TKA demographics
Mean age (years) (SD)	67.10 (8.52)/278
Female – no. (%)	182 (65.47)/278
Post-secondary education – no. (%)	155 (56.57)/274
Current smoking – no. (%)	17 (6.16)/276
Body mass index (kg/m²) (SD)	32.19 (6.08)/278
Pre-TKA knee OA characteristics
Mean WOMAC pain (0-100) (SD)	57.22 (16.53)/278
Mean KOOS physical function short form (0-100) (SD)	52.92 (16.25)/278
Pre-TKA comorbidities
Mean PHQ-8 depressive symptoms (0-24) (SD)	6.76 (5.72)
Median total number troublesome joints (including index joint) (IQR)	2 (1, 3)
Number of comorbidities^a – no. (%)
0	94 (33.814)/278
1	101 (36.33)/278
2	58 (20.86)/278
≥ 3	25 (8.99)/278

TKA Total knee arthroplasty, WOMAC Western Ontario and McMaster Universities Osteoarthritis Index, KOOS Knee injury and osteoarthritis outcome score, PHQ-8 Patient health questionnaire - 8
^aNot including depression and number of troublesome joints

ISSN: 1471-2474