| WOMAC function subscale | Individualised WOMAC | WOMAC Top 5 | |||
| Multiplicative | Additive | ||||
| Study population (n = 1218) | Mean baseline score | 43.71 (16.74) | NR | NR | 58.04 (16.46) |
| Mean change in score | −11.42 (14.31) | −15.95 (16.70) | |||
| Likert 5 group (n = 413) | Mean baseline score | 42.06 (16.10) | 27.64 (13.08) | 51.46 (13.08) | 55.80 (16.01) |
| Mean change in score | −9.80 (12.59) | −6.57 (8.24) | −4.37 (5.64) | −13.95 (15.42) | |
| Likert 3 group (n = 406) | Mean baseline score | 44.35 (16.87) | 34.10 (16.02) | 55.18 (13.87) | 58.44 (16.69) |
| Mean change in score | −12.75 (14.83) | −9.67 (11.48) | −7.22 (8.51) | −17.15 (17.14) | |
| VAS group (n = 399) | Mean baseline score | 44.76 (17.15) | 28.58 (15.66) | 51.70 (17.79) | 59.96 (16.47) |
| Mean change in score | −11.74 (15.29) | −8.49 (9.99) | −3.35 (4.37) | −16.80 (17.36) | |
Each score was linearly transformed to a 0–100 score. Results are presented as mean (SD). Mean changes in scores were calculated between the baseline visit at week 0 (W0) and the final visit at week 4 (W4): W4–W0.
NR, not relevant; VAS, visual analogue scale; WOMAC, Western Ontario and McMaster Universities osteoarthritis index