Table 3 Comparison of differences in skills drop between the initial approach and the modified approach

9.8 (8.9–10.8)

3.7 (2.9–4.5)

< 0.01

7.8 (6.4–9.1)

4.1 (3.1–5.1)

< 0.01

11.6 (9.9–13.2)

1.7 (0.0–3.3)

< 0.01

11.8 (9.5–14.1)

6.2 (4.3–8.1)

< 0.01

11.4 (9.7–13.2)

4.5 (3.2–5.8)

< 0.01

8.6 (6.2–11.0)

4.3 (2.7–6.0)

< 0.01

14.2 (11.0–17.3)

3.2 (0.5–5.9)

< 0.01

13.5 (9.4–17.6)

7.6 (4.4–10.7)

0.02

14.2 (12.1–16.2)

10.2 (8.5–12.0)

< 0.01

11.5 (8.6–14.5)

9.7 (7.4–12.0)

0.17

16.3 (12.9–19.8)

8.2 (4.8–11.6)

< 0.01

16.8 (12.1–21.7)

15.8 (11.7–20.0)

0.38

6.3 (5.0–7.5)

−0.7 (− 1.8–0.3)

< 0.01

5.0 (3.4–6.7)

0.6 (− 0.7–2.0)

< 0.01

7.1 (4.9–9.4)

− 3.2 (− 5.3 - -1.1)

< 0.01

7.8 (4.9–10.6)

−0.4 (− 2.9–2.1)

< 0.01