title: Prevalence of rheumatic regional pain syndromes in adults from Mexico: a community survey using COPCORD for screening and syndrome-specific diagnostic criteria.
abstract: OBJECTIVE
  To assess the prevalence of rheumatic regional pain syndromes (RRPS) in 3 geographical areas of México using the Community Oriented Program in the Rheumatic Diseases (COPCORD) screening methodology and validate by expert consensus on case-based definitions.
  
  
  METHODS
  By means of an address-based sample generated through a multistage, stratified, randomized method, a cross-sectional survey was performed on adult residents (n = 12,686; age 43.6 ± 17.3 yrs; women 61.9%) of the states of Nuevo León, Yucatán, and México City. Diagnostic criteria for specific upper (Southampton group criteria) and lower limb (ad hoc expert consensus) RRPS were applied to all subjects with limb pain as detected by COPCORD questionnaire.
  
  
  RESULTS
  The overall prevalence of RRPS was 5.0% (95% CI 4.7-5.4). The most frequent syndrome was rotator cuff tendinopathy (2.36%); followed by inferior heel pain (0.64%); lateral epicondylalgia (0.63%); medial epicondylalgia (0.52%); trigger finger (0.42%); carpal tunnel syndrome (0.36%); anserine bursitis (0.34%); de Quervain's tendinopathy (0.30%); shoulder bicipital tendinopathy (0.27%); trochanteric syndrome (0.11%); and Achilles tendinopathy (0.10%). There were anatomic regional variations in the prevalence of limb pain: Yucatán 3.1% (95% CI 2.5-3.6); Nuevo León 7.0% (95% CI 6.3-7.7); and México City 10.8% (95% CI 9.8-11.8). Similarly, the prevalence of RRPS showed marked geographical variation: Yucatán 2.3% (95% CI 1.8-2.8); Nuevo León 5.6% (95% CI 5.0-6.3); and México City 6.9% (95% CI 6.2-7.7).
  
  
  CONCLUSIONS
  The overall prevalence of RRPS in México was 5.0%. Geographical variations raise the possibility that the prevalence of RRPS is influenced by socioeconomic, ethnic, or demographic factors.
authors.affiliation: Unidad de Investigación Médica, Unidad Médica de Alta Especialidad, Instituto Mexicano del Seguro Social, Mérida, Yucatán, México. nemegyei@yahoo.com.mx
authors.forename: Jose
authors.initials: J
authors.lastname: Alvarez-Nemegyei
authors.forename: Ingris
authors.initials: I
authors.lastname: Peláez-Ballestas
authors.forename: Jacqueline
authors.initials: J
authors.lastname: Rodríguez-Amado
authors.forename: Luz Helena
authors.initials: LH
authors.lastname: Sanin
authors.forename: Conrado
authors.initials: C
authors.lastname: Garcia-Garcia
authors.forename: Mario A
authors.initials: MA
authors.lastname: Garza-Elizondo
authors.forename: Adalberto
authors.initials: A
authors.lastname: Loyola-Sanchez
authors.forename: Rubén
authors.initials: R
authors.lastname: Burgos-Vargas
authors.forename: Maria-Victoria
authors.initials: MV
authors.lastname: Goycochea-Robles
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D018672:Community Health Planning; D020918:Complex Regional Pain Syndromes / Q000175:diagnosis / Q000453:epidemiology* / Q000209:etiology; D003430:Cross-Sectional Studies; D005260:Female; D006306:Health Surveys; D006801:Humans; D007390:International Agencies; D008297:Male; D008403:Mass Screening / Q000379:methods*; D008800:Mexico / Q000453:epidemiology; D008875:Middle Aged; D012216:Rheumatic Diseases / Q000150:complications / Q000175:diagnosis / Q000453:epidemiology*; D055815:Young Adult