The researchers used a computerized coin flip to assign patients to treatment with manual therapy, physical therapy, or continued care by their doctor. One of 6 manual therapists performed the manual therapy for 45 minutes, once per week, for up to 6 weeks. One of 5 physical therapists performed the physical therapy for 30 minutes, twice per week, for up to 6 weeks. The doctors used medications to treat pain and inflammation and gave advice about rest, hot compresses, and home exercises. All patients were allowed to use home exercises, nonprescription medicines, or medicines their doctors had prescribed before referring them to the study. Seven weeks after beginning treatment, patients rated their neck pain on a scale from “much worse” to “completely recovered.” The researchers compared the number of patients in each group who reported feeling “much improved” or “completely recovered.”