Table 2.
Comparison of functional outcomes of PIP tenderness and without PIP tenderness groups at each follow-up time point
| Functional outcomes | PIP tenderness (n = 89) |
Without PIP tenderness (n = 101) |
Difference Between Groups | P valuea |
|---|---|---|---|---|
| Mean (95% CI) | Mean (95% CI) | Mean (95% CI) | ||
| Overall resting digit pain b | ||||
| Pre-op | 3.8 (3.3–4.3) | 2.5 (2.0–3.0) | 1.2 (0.5–1.9) | 0.001* (0.001) |
| Post-op 1 week | 1.8 (1.5–2.2) | 0.9 (0.6–1.2) | 0.8 (0.4–1.2) | < 0.001* (< 0.001) |
| Post-op 2 weeks | 1.0 (0.7–1.2) | 0.4 (0.2–0.7) | 0.4 (0.1–0.6) | 0.068 (0.017) |
| Overall motion digit pain | ||||
| Pre-op | 7.7 (7.3–8.2) | 6.6 (6.2–7.0) | 1.1 (0.4–1.7) | 0.001* (0.001) |
| Post-op 1 week | 4.4 (4.0–4.8) | 3.6 (3.2–4.0) | 0.8 (0.2–1.4) | 0.030* (0.005) |
| Post-op 2 weeks | 3.2 (2.8–3.6) | 2.3 (1.9–2.7) | 0.9 (0.3–1.4) | 0.018*(0.003) |
| Post-op 6 weeks | 1.9 (1.5–2.2) | 1.3 (1.0–1.6) | 0.5 (0.1–1.0) | 0.138 (0.023) |
| Post-op 3 months | 0.8 (0.5–1.0) | 0.6 (0.3–0.8) | 0.2 (0.2–0.5) | 1.000 (0.354) |
| PSFS | ||||
| Pre-op | 5.5 (5.0–5.9) | 5.3 (4.9–5.7) | 0.2 (-0.4–0.8) | 1.000 (0.542) |
| Post-op 1 week | 5.5 (4.9–6.1) | 6.1 (5.6–6.7) | -0.6 (-1.4–0.1) | 0.660 (0.110) |
| Post-op 2 weeks | 7.3 (6.9–7.7) | 7.6 (7.2–8.0) | -0.3 (-0.9–0.3) | 1.000 (0.282) |
| Post-op 6 weeks | 8.5 (8.3–8.8) | 8.8 (8.5–9.1) | -0.3 (-0.6–0.1) | 1.000 (0.192) |
| Post-op 3 months | 9.4 (9.2–9.6) | 9.5 (9.4–9.7) | -0.1 (-0.3–0.1) | 1.000 (0.282) |
| TAM (degrees) | ||||
| Pre-op | 187.3 (175.9–198.7) | 175.5 (175.9–198.7) | 13.4 (-1.5–28.3) | 0.308 (0.077) |
| Post-op 1 week | 173.1 (163.7–182.4) | 170.1 (160.8–179.4) | 2.6 (-7.6–12.9) | 1.000 (0.612) |
| Post-op 2 weeks | 198.6 (190.7–206.5) | 200.2 (192.3–208.0) | -1.9 (-10.4–6.6) | 1.000 (0.658) |
| Post-op 6 weeks | 221.9 (214.0–229.8) | 221.5 (213.2–229.9) | 0.4 (-11.1–11.8) | 1.000 (0.954) |
| PIP extension (degrees)c | ||||
| Pre-op | -1.2 (-3.6–0.9) | 0.5 (-1.5–2.5) | -0.1 (-2.7–2.6) | 1.000 (0.964) |
| Post-op 1 week | -1.1 (-3.2–1.0) | 0.4 (-1.5–2.3) | 0.2 (-1.8–2.3) | 1.000 (0.859) |
| Post-op 2 weeks | 0.5 (-1.5–2.5) | 3.9 (2.0–5.8) | -1.7 (-3.4–0.1) | 0.060 (0.240) |
| Post-op 6 weeks | 4.1 (2.0–6.2) | 5.8 (3.7–7.9) | -1.6 (-4.7–1.3) | 1.000 (0.259) |
Data derived from linear mixed model analysis for repeated measurements; a The p values adjusted by Bonferroni analysis are presented, with the p values before the Bonferroni analysis in parentheses (6 comparisons for motion pain and PSFS and 4 comparisons for rest pain, TAM and PIP extension); *Statistically significant (P < 0.05); b Overall digit pain at rest subsided by 6 weeks follow-up; c extension (-), flexion contracture; extension (+), hyperextension; PSFS, patient-specific functional scale; TAM, total arc of motion