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. 2009 Mar 1;66(5):299–304. doi: 10.1136/oem.2008.040212

Figure 1.

Figure 1

Flow chart of cases meeting the study eligibility criteria. *Cases also bearing the following ICD-9 codes were considered not to be idiopathic: 245 (hypothyroidism, thyroiditis), 250 (diabetes mellitus), 274.0 (gout), 277.3 (amyloidosis), 278 (overweight/obesity), 646.8 and 646.9 (complications of pregnancy), 710 (connective tissue diseases), 714 (rheumatoid arthritis), 715.3 and 715.4 (osteoarthritis of the hand/forearm), 813.4 (wrist fractures), 955 (shoulder/upper limb peripheral nerve injuries) and V22 (pregnancy). CTS, carpal tunnel syndrome.