Is chronic pain associated with somatization/hypochondriasis? An evidence-based structured review.

Study Design:  This is an evidence-based structured review. Objectives:  The objectives of this review were to answer the following questions: (1) Are somatization/hypochondriasis associated with chronic pain? (2) Is the degree of somatization/hypochondriasis related to pain levels? (3) Does pain treatment improve somatization/hypochondriasis? (4) Are some pain diagnoses differentially associated with somatization/hypochondriasis? Methods:  Fifty-seven studies which fulfilled inclusion criteria and had high quality scores were sorted by the above-mentioned objectives. Agency for health care policy and research guidelines were utilized to type and characterize the strength/consistency of the study evidence within each objective. Results:  Somatization and hypochondriasis were both consistently associated with chronic pain (consistency ratings B and A, respectively). Study evidence indicated a correlation between pain intensity and presence of somatization and hypochondriasis (consistency rating A and B, respectively). Pain treatment improved somatization and hypochondriasis (consistency rating B and A, respectively). Some chronic pain diagnostic groups somatized more (consistency rating B). Conclusions:  Somatization is commonly associated with chronic pain and may relate to pain levels.