Table 4 A comparison of demographic and clinical data among patient subgroups with chronic neck pain (CNP), chronic low back pain (CLBP), and both conditions (N = 151)

Age, years +/− SD^a

51.7 +/−  11.9

59.0 +/−  16.7

55.6 +/−  14.6

LS vs. C < 0.07

LS vs. LS + C Ns

C vs. L + C Ns

Women

22 (91.7%)

55 (75.3%)

44 (81.5%)

Ns

Men

2 (8.3%)

18 (24.7%)

10 (18.5%)

Ns

Pain NRS mean^b

5.5 (1.5)

6.0 (2.0)

6.0 (2.0)

Ns

BMI^a

24.4 +/− 3.6

23.6 (6.4)

27.7 +/− 5.6

26.9 (7.6)

26.1 +/− 4.8

26.0 (5.7)

Ns

Unemployment

16 (66.7%)

34 (46.6%)

29 (54.7%)

Ns

Sleep disturbances

12 (50.5%)

41 (56.2%)

21 (38.9%)

Ns

Alcohol use

0 (0.0%)

10 (13.7%)

6 (11.1%)

Ns

CSI-Pol < 40

17 (70.8%)

51 (69.9%)

26 (48.1%)

p < 0.03 (whole model)

C vs. LS Ns

LS vs. C + LS < 0.01

C vs. C + LS < 0.06

CSI-Pol > 40

22 (30.1%)

7 (29.2%)

28 (51.8%)

p < 0.03 (whole model)

LS vs. C ns

LS vs. LS + C < 0.001

C vs. L + C < 0.03

CSI-Pol

32.0 +/− 16.7

Median 29.5 (IQR 23.5)

31.0 +/− 16.5

Median 32.0 (IQR 25.0)

41.0 +/−  16.5

Median 40.5 (IQR 23.0)

p < 0.03 (whole model)

LS vs. C ns

Ls vs LS + C p < 0.01

C vs. LS + C

P < 0.06

ODI mean^a

–

19.7 +/−8.6

Median 19.0 (IQR 12.0)

ODI% 39.5 +/− 17.2

Median 38.0 (IQR 24.0)

ODI 21 +/− 7.9

Median 22.0 (IQR 13.0)

ODI% 42.1 +/−  15.6

Median 44.0 (IQR 24.0)

Ns

NDI mean^b

19.2 +/− 6.2

Median 19.5 (IQR 8.0)

NDI% 36.7 +/− 12.9

Median 38.0 (IQR 18.0)

–

19.2 +/− 7.7

Median 20.0 (IQR 11.0)

NDI% 38.9 +/− 15.8

Median 41.0 (IQR 22.0)

NS