Pain Research and Treatment / 2015 / Article / Fig 1

Research Article

Central Sensitization and Perceived Indoor Climate among Workers with Chronic Upper-Limb Pain: Cross-Sectional Study

Figure 1

Average pressure pain threshold (PPT) of nonpainful (tibialis anterior) and painful (extensor carpi radialis brevis and infraspinatus) muscles among slaughterhouse workers with chronic pain and pain-free controls. , denotes difference from the pain-free control group (; , resp.).