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. Author manuscript; available in PMC: 2012 Aug 1.
Published in final edited form as: Arthritis Care Res (Hoboken). 2011 Aug;63(8):1178–1187. doi: 10.1002/acr.20489

Figure 1.

Figure 1

Test Results by Intelligence Level

SD = standard deviation; *p<.01; #p<.05; Average IQ defined as Intelligence Quotient ≥ 90; Below Average IQ defined as Intelligence Quotient <89