Table 1 Descriptive information for the sample

Sex: Male:

5

4

7

16

0.55

   Female:

15

16

13

44

Age in years (sd)

22.95 (2.06)

23.10 (3.49)

23.20 (3.66)

23.08 (3.10)

0.97

Race: Caucasian:

18

14

16

48

0.23

   African

   American:

1

1

1

3

   Other:

1

5

3

9

Education (years (sd))

16.20 (1.32)

16.21 (1.51)

16.03 (1.26)

16.14 (1.35)

0.89

History of LBP: Yes:

5

3

2

10

0.70

   No:

14

15

17

46

   Missing:

1

2

1

4

Pain Threshold

   Temperature (sd)

42.42 (5.25)

42.99 (2.89)

41.98 (3.12)

42.46 (3.86)

0.72

   NRS Rating (sd)

13.89 (11.72)

19.63 (20.33)

17.40 (18.16)

16.97 (17.01)

0.57

Baseline Pain Testing

Lower Extremity NRS (sd)

34.92 (23.24)

34.01 (28.11)

27.62 (20.93)

32.10 (24.02)

0.59

Low Back NRS (sd)

46.22 (24.08)

52.99 (27.05)

43.86 (26.18)

47.76 (25.64)

0.52

Psychological Questionnaires

PCS (sd)

15.15 (9.15)

17.30 (9.53)

14.75 (8.43)

15.73 (8.96)

0.63

FPQ (sd)

72.25 (13.47)

81.1 (19.43)

76.65 (14.81)

76.67 (16.24)

0.23

Anxiety VAS (sd)

23.20 (17.60)

21.89 (23.96)

24.30 (19.76)

23.15 (20.21)

0.94