Table 2 Comparison of functional outcomes of PIP tenderness and without PIP tenderness groups at each follow-up time point

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)