Demographics of included and excluded participants at baseline.
| Baseline Characteristics | Included, n = 313 | Excluded: 26 Weeks Not Within 140–225 Days, or Missing Data, n = 162 | Excluded: No Followup Assessment, n = 84 | p v |
|---|---|---|---|---|
| Female (%) | 62 | 59 | 48 | 0.067 |
| Age, yrs, mean (SD) | 68.5 (9.25) | 69.0 (9.92) | 68.0 (10.85) | 0.76 |
| Signal joint knee (%) | 77 | 65 | 68 | 0.022 |
| Signal joint knee (%) responders | 83 | |||
| Signal joint knee (%) nonresponders | 75 | |||
| On elective joint replacement list (%) | 88 | 90 | 86 | 0.68 |
| Residence | ||||
| At home with able person (%) | 64 | 68 | 68 | 0.46 |
| Home alone (%) | 28 | 22 | 21 | |
| Other‡ (%) | 8 | 10 | 11 | |
| Speaks English* (%) | 90 | 92 | 88 | 0.61 |
| Employment (%) | 0.60 | |||
| Not currently employed† | 86 | 82 | 84 | |
| Currently employed^ | 14 | 18 | 16 | |
| Education (%) | 0.94 | |||
| Finished secondary school or higher¤ | 30 | 29 | 32 | |
| Did not finish secondary school° | 60 | 71 | 68 | |
| BMI, mean (SD) | 31.9 (6.88) | 32.0 (6.57) | 31.7 (6.36) | 0.94 |
| BMI knees, mean (SD) | 32.52 (7.12) | |||
| BMI hips, mean (SD) | 30.03 (5.84) | |||
| Pain VAS, mean (SD) | 5.5 (1.84) | 5.7 (1.74) | 5.7 (2.20) | 0.65 |
| No. comorbidities (%) | ||||
| Low (0–2) | 54 | 44 | 43 | |
| High (3–5) | 39 | 51 | 42 | |
| Very high (≥ 6) | 8 | 5 | 10 | |
| Missing (no.) | 5 | |||
| WOMAC global score#, mean (SD), range | 43.4 (19.39), 0–100 | 38.4 (17.17), 0–90 | 41.3 (21.72), 3–98 | 0.027 |
| WOMAC global score, knees, mean (SD) | 44.2 (19.66) | 40.8 (18.59) | 41.5 (21.23) | |
| WOMAC global score, hips, mean (SD) | 40.7 (18.34) | 33.6 (12.96) | 40.8 (23.23) | |
| WOMAC global score for responders, mean (SD), range | 33.8 (18.06), 1–79 | |||
| WOMAC global score for nonresponders, mean (SD), range | 47.4 (18.51), 4–100 | |||
| 6 Minute Walk Test, m, mean (SD) | 337.4 (118.52) | 324.3 (120.51) | 323.5 (114.51) | 0.44 |
Data in bold face are statistically significant.
↵‡ Other includes residence at hostel or residence with non-able person.
↵* Participants who did not speak English (about 10%) required the use of an interpreter.
↵† Not currently employed includes participants who reported they were retired, performed home duties, and other.
↵^ Currently employed includes participants who reported engaging in full/part time/volunteer work.
↵¤ Includes participants who reported finishing secondary school, tertiary certificate, or university graduate.
↵° Includes participants who did not finish secondary school, and those who reported no formal schooling.
↵# The WOMAC global scores are a transformed score calculated from the HOOS and KOOS: 100 indicates no problems and 0 indicates extreme problems.
↵v Independent ANOVA or chi-squared statistic comparing included participants with the 2 other groups. VAS: visual analog scale; WOMAC: Western Ontario and McMaster Universities Arthritis Index; BMI: body mass index.