Table 5 Results of changes between weeks in NPS, PPT, NDI and SF12 scores between the treatment groups using independent t-test

Mean difference (SD)

Mean difference (SD)

95% CI of the difference

p-value

NPS

0–4 weeks

2.4 (0.50)

1.9 (0.44)

0.50 (− 0.87, 1.82)

0.484

0–8 weeks

2.6 (0.49)

2.2 (0.42)

0.40 (− 0.89, 1.73)

0.525

0–12 weeks

3.6 (0.49)

2.3 (0.40)

1.30 (0.017, 2.59)

0.047

PPT

0–4 weeks

− 0.48 (0.21)

− 0.5 (0.17)

0.10 (− 0.46, 0.66)

0.718

0–8 weeks

− 0.51 (0.21)

− 0.5 (0.17)

0.02 (-.55, 0.58)

0.951

0–12 weeks

− 0.66 (0.25)

− 0.6 (0.17)

0.02 (-.59, 0.64)

0.942

NDI

0–4 weeks

6.47 (2.6)

5.56 (2.1)

0.90 (− 5.87, 7.6)

0.791

0–8 weeks

6.13 (2.7)

4.75 (2.6)

1.38 (− 6.2, 8.96)

0.718

0–12 weeks

8.22 (2.9)

5.12 (2.7)

3.09 (− 5.01, 11.20)

0.449

SF12 Physical Score

0–4 weeks

− 1.8 (1.1)

− 0.9 (1.1)

− 0.91(− 4.1, 2.31)

0.5753

0–8 weeks

− 2.8 (1.1)

0.07 (1.4)

− 2.9 (− 6.6, 0.84)

0–12 weeks

− 3.4 (1.4)

− 1.40 (1.7)

− 1.93 (− 6.51, 2.64)

0.4020

SF12 Mental Score

0–4 weeks

− 1.4 (6.3)

− 1.42 (8.2)

0.01 (− 3.48, 3.49)

0.9978

0–8 weeks

− 0.6 (7.5)

− 0.30 (10.4)

− 0.25 (− 4.58, 4.09)

0.9103

0–12 weeks

− 2.7 (8.8)

− 2.50 (9.7)

− 0.18 (− 4.62, 4.26)

0.9354