Table 3 Relative risks (RR) for neck pain alone (NP), low back pain alone (LBP), and concomitant neck and low back pain (NLBP) in 1999, and in 2011 compared to the reference year 1991

1.30 (0.97 to 1.75)

1.25 (0.89 to 1.76)

1.32 (1.07 to 1.63)

1.52 (1.18 to 1.94)

1.64 (1.38 to 1.94)

1.66 (1.38 to 2.00)

1.29 (1.17 to 1.42)

1.30 (1.17 to 1.45)

0.76 (0.50 to 1.14)

1.14 (0.75 to 1.75)

0.85 (0.65 to 1.11)

1.27 (0.94 to 1.72)

0.87 (0.57 to 1.33)

1.12 (0.72 to 1.75)

0.77 (0.58 to 1.03)

0.92 (0.67 to 1.27)

1.77 (1.09 to 2.87)

2.37 (1.42 to 3.95)

1.36 (1.03 to 1.79)

2.33 (1.75 to 3.12)

2.07 (1.38 to 3.10)

3.71 (2.50 to 5.50)

1.46 (1.21 to 1.76)

2.29 (1.90 to 2.76)