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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

From: Time trends in single versus concomitant neck and back pain in finnish adolescents: results from national cross-sectional surveys from 1991 to 2011

  RR (95% CI) for pain in 1999 compared to 1991 (RR 1.00) RR (95% CI) for pain in 2011 compared to 1991 (RR 1.00)
NP alone   
Boys   
  12-14 1.30 (0.97 to 1.75) 1.25 (0.89 to 1.76)
  16-18 1.32 (1.07 to 1.63) 1.52 (1.18 to 1.94)
Girls   
  12-14 1.64 (1.38 to 1.94) 1.66 (1.38 to 2.00)
  16-18 1.29 (1.17 to 1.42) 1.30 (1.17 to 1.45)
LBP alone   
Boys   
  12-14 0.76 (0.50 to 1.14) 1.14 (0.75 to 1.75)
  16-18 0.85 (0.65 to 1.11) 1.27 (0.94 to 1.72)
Girls   
  12-14 0.87 (0.57 to 1.33) 1.12 (0.72 to 1.75)
  16-18 0.77 (0.58 to 1.03) 0.92 (0.67 to 1.27)
NLBP   
Boys   
  12-14 1.77 (1.09 to 2.87) 2.37 (1.42 to 3.95)
  16-18 1.36 (1.03 to 1.79) 2.33 (1.75 to 3.12)
Girls   
  12-14 2.07 (1.38 to 3.10) 3.71 (2.50 to 5.50)
  16-18 1.46 (1.21 to 1.76) 2.29 (1.90 to 2.76)
  1. Calculations are based on the prevalences presented in Table 2.