Table 1 Subject characteristics and results of the QVAS and MPQ-SF questionnaires by group (n = 779)

Number

271

360

148

Mean age (SD)

23.3 (4.0)

23.6 (4.0)

23.9 (4.5)

0.42

Age range

17–39

16–46

18–39

LBP now^{a, b} (SD)

25.4 (22.6)

17.7 (21.5)

11.2 (15.3)

<0.001

LBP average^a (SD)

24.9 (19.8)

19.4 (19.0)

11.2 (12.3)

<0.001

LBP best^a (SD)

8.5 (11.9)

5.2 (9.1)

2.3 (4.9)

<0.001

LBP worst^a (SD)

56.2 (27.6)

48.1 (28.6)

39.8 (25.3)

<0.001

Sensory pain score^b (SD)

16.5 (14.0)

12.8 (12.4)

9.8 (9.2)

<0.001

Affective pain score^b (SD)

8.4 (13.2)

6.9 (11.6)

5.6 (8.2)

0.047

Total pain score^b (SD)

14.3 (13.0)

12.2 (13.6)

9.3 (9.9)

<0.001