Figure 1.

Summary of the studies reviewed on neck pain. This figure summarizes the main findings from the studies presented on the efficacy (compared to inactive controls) and effectiveness of spinal manipulative therapy (SMT) against different comparators for acute and chronic neck pain. The green circles with the positive sign indicate studies reporting pain-related outcomes in favor of SMT against or when added to the comparator. Yellow circles indicate similar effectiveness. Red circles with a negative sign indicate that SMT is inferior or does not add any value to the comparator.