Table 4.
Responsiveness of foot and ankle outcome score (FAOS) subscales
| FAOS subscale | N | Preoperative score ± SD | Postoperative score ± SD | p Value | ES | SRM |
|---|---|---|---|---|---|---|
| Pain | 55 | 58.59 ± 17.30 | 79.00 ± 18.07 | <0.0001 | 1.180 | 0.929 |
| Symptoms | 53 | 66.18 ± 19.90 | 77.69 ± 19.85 | 0.0013 | 0.578 | 0.466 |
| Daily activities | 44 | 75.18 ± 17.60 | 86.05 ± 16.08 | 0.0013 | 0.617 | 0.519 |
| Sports/recreation | 41 | 51.28 ± 28.08 | 72.59 ± 25.06 | 0.0004 | 0.759 | 0.608 |
| Quality of life | 55 | 36.40 ± 21.86 | 56.93 ± 25.65 | <0.0001 | 0.939 | 0.839 |
Responsiveness reflects whether the instrument changes as the underlying condition changes. All FAOS subscales were responsive to change after surgery. The scores shown are expressed as mean values with standard deviations. The effect size (ES) and standard response mean (SRM) indicate that QoL and pain were the most responsive FAOS subscales. Significance set at p < 0.05. The N value differs among subscales because some patients did not complete all questions of that particular subscale; thus, subscale score comparison could not be determined