Effect of PROMIS PF improvement on improvement in PHQ-9.
| Effect Size | 95% CI | R 2 | P Valuea | |
| Delta PHQ-9 | ||||
| Preoperative | — | — | — | — |
| 6 weeks | −0.143 | [−0.030, 0.012] | 0.038 | 0.071 |
| 12 weeks | −0.117 | [−0.25,−0.015] | 0.047 | 0.083 |
| 6 months | −0.144 | [−0.28,−0.005] | 0.061 | 0.042 |
| 1 year | −0.225 | [−0.42,−0.259] | 0.101 | 0.028 |
Boldface indicates statistical significance (P < 0.05).
aP value was calculated using linear regression.
PHQ-9, Patient Health Questionnaire-9; PROMIS PF, Patient-Reported Outcomes Measurement Information System Physical Function.