Baseline characteristics in those who had unguided and ultrasound-guided injections.
| Variables | Participants with Unguided Injection | Participants with Ultrasound-guided Injection |
|---|---|---|
| N | 120 | 79 |
| Age, yrs, mean (SD) | 62.3 (10.3) | 63.5 (10.4) |
| Females, frequency (%) | 62 (51.7) | 43 (54.4) |
| No. days to followup appointment | 8.0 (7.0–14.0) | 8.0 (7.0–14.0) |
| KOOS pain subscale score (0–100)* | 44.4 (36.1–55.6) | 41. 7 (36.1–52.8) |
| Pain on nominated activity VAS (0–10)** | 7.0 (5.5–7.7) ¤ | 7.2 (5.8–8.4) † |
| Pain in last week VAS (0–10)** | 6.5 (4.7–7.8) ¤ | 6.6 (5.3–8.3) † |
| No. responders to injection, at followup visit, frequency (%) | 85 (70.8) | 61 (77.2) |
Values are median (IQR) unless otherwise specified.
↵* KOOS pain subscale is scored from 100 (no pain) to 0 (extreme pain).
↵** VAS is scored from 0 (no pain) to 10 (pain as bad as you can imagine).
↵¤ N = 5 and 3 participants neglected to complete their pain on nominated activity VAS and pain in last week VAS, respectively.
↵† N = 4 and 2 participants neglected to complete their pain on nominated activity VAS and pain in last week VAS, respectively. IQR: interquartile range; KOOS: Knee Injury and Osteoarthritis Outcome Score; VAS: visual analog scale.