Table 3 Impaction and shortening at 3 and 6 months

 3 months

Mean (sd)

5.2 (4.8)

5 (4.5)

5.4 (6)

5.5 (4.4)

Median (IQR)

4.9 (1.7–7.2)

4.9 (2.5–6.6)

2.6 (1.4–7.7)

5.4 (1.8–9.4)

Range

0–21.1

0–18

0.2–21.1

0.2–13.1

Missing

15

10

3

2

 6 months

Mean (sd)

5.4 (5.2)

5.4 (4.8)

5.6 (5.9)

5 (6.7)

Median (IQR)

4.7 (2.6–6.9)

4.7 (3.2–5.9)

4.5 (2–8.1)

7.3 (3.4–8.9)

Range

− 4.8–19.6

0–19.6

− 2.9–18.7

− 4.8–10.1

Missing

30

13

6

11

 Global

0.872

 Δ 3–6 months

0.979

Shortening

 3 months

Mean (sd)

8.6 (8.2)

8.4 (7.0)

8.3 (11.9)

9.3 (6.0)

Median (IQR)

8.3 (2.4–12.1)

8.6 (4.3–12.6)

8.4 (0.3–11.4)

8.3 (5.7–13.3)

Range

− 6.2–42

− 6.2–22.3

− 4.1–42

1.1–22

Missing

15

10

3

2

 6 months

Mean (sd)

7.0 (9.0)

8.1 (10.3)

4.9 (7.9)

6.7 (4.0)

Median (IQR)

6 (1.2–10.5)

5 (2.5–11.4)

6.7 (− 2.3–12.4)

7.8 (4.9–9.6)

Range

− 5.8–38.9

− 3.9–38.9

− 5.8–13.6

1.2–10.1

Missing

30

13

6

11

 Global

0.982

 Δ 3–6 months

0.218