Table 1.
Demographic and Biomedical Characteristics of Participantsa
| Characteristic | Value for Participants Whose Data Were: | P b | |
|---|---|---|---|
| Included in Reliability Analysis (n=28) | Excluded From Reliability Analysis (n=16) | ||
| Age, y | 68.6 (7.5) | 66.8 (5.3) | .18 |
| Sex, % women | 21 (75.0) | 9 (56.3) | .31 |
| BMI, kg/m2 | 29.6 (4.3) | 30.7 (4.0) | .58 |
| Race, % white | 26 (92.9) | 14 (87.5) | .61 |
| Education, n (%) | 1.00 | ||
| High school | 12 (42.9) | 7 (43.8) | |
| College | 16 (57.1) | 9 (56.3) | |
| Duration of arthritis, no. (%) | .85 | ||
| 1–10y | 20 (71.4) | 11 (68.8) | |
| >10 y | 8 (28.6) | 5 (31.3) | |
| Time from TKA, n (%) | .68 | ||
| 3-4.9 mo | 19 (67.9) | 12 (75.0) | |
| 5–6mo | 9 (32.1) | 4 (25.0) | |
| Knee pain,c median (Q25, Q75) | |||
| Surgical side | 2 (1, 3) | 3 (2, 5) | .13 |
| Nonsurgical side | 3 (0, 6) | 3 (0, 6) | .67 |
| Physical functiond | 18.8 (8.3) | 20.0 (12.3) | .31 |
a
Values are means (SD), unless otherwise indicated. BMI=body mass index, TKA=total knee arthroplasty, Q25-25th quartile, Q75=75th quartile.
b
P value for difference between participants whose data were included in the reliability analysis and those whose data were excluded from the reliability analysis.
c
Assessed with an 11-point numeric pain scale ranging from 0 (”no pain”) to 10 (”worst imaginable pain”).39,40
d
Assessed with the 17-item Western Ontario and McMaster Universities Osteoarthritis Index—physical function subscale. Each item was scored from 0 (no limitation) to 4 (extreme limitation), with a total score of up to 68 points. Higher scores indicated worse function.41