
| PMC full text: | Published online 2014 May 29.   doi:  10.1186/1471-2474-15-187 
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Figure 1

The association between frequency and pain intensity at age 11–13 and two years later. FPS-R = Faces pain scale – revised; LBP = Low back pain; MBP = Mid back pain; NP = Neck pain. Error bars show 95% confidence intervals.