title: [Influence of age on the clinical and biological characteristics of systemic scleroderma].
abstract: OBJECTIVE
  The present study was aimed at assessing the influence of age on clinical and biological features of systemic sclerosis.
  
  
  METHODS
  This retrospective study included 151 consecutive patients with systemic sclerosis. The median age at diagnosis was 50.0 years (range: 10-84 years). Patients were divided into two groups according to their age (lower than 50.0 years of age: 73 patients, equal to or above 50 years of age: 78 patients). The following features were compared between the two groups: gender, disease duration, extent of skin sclerosis, Crest syndrome, lung fibrosis, secondary Sjögren's syndrome, antinuclear, anticentromere, and anti-Scl70 antibodies.
  
  
  RESULTS
  The disease duration was significantly higher in patients over 50 years of age (7.1 +/- 6.8 years vs 5.5 +/- 5.0 years, P < 0.05). Crest syndrome, secondary Sjögren's syndrome and anticentromere antibodies were significantly more common in patients over 50 years of age (17/73 vs 30/78, P < 10(-2); 9/73 vs 20/78, P < 10(-2), and 19/73 vs 31/78, P < 0.05; respectively). Anti-Scl70 antibodies were significantly more common in patients under 50 years of age (17/73 vs 10/78, P < 10(-2)). No significant difference was found in regard to the other features.
  
  
  CONCLUSIONS
  The clinical and biological patterns of systemic sclerosis are different according to the age at disease onset. Crest syndrome including anticentromere antibodies and Sjögren's syndrome is more common in elderly patients, while anti- Scl-70 antibodies are more common in younger patients. This suggests the involvement of various mechanisms in the pathogenesis of systemic sclerosis, and that these mechanisms may depend on the age.
authors.affiliation: Service de médecine interne A, Hôpital Claude-Huriez, CHRU, Lille, France.
authors.forename: X
authors.initials: X
authors.lastname: Kyndt
authors.forename: D
authors.initials: D
authors.lastname: Launay
authors.forename: M
authors.initials: M
authors.lastname: Hebbar
authors.forename: P Y
authors.initials: PY
authors.lastname: Hatron
authors.forename: C
authors.initials: C
authors.lastname: Fournier
authors.forename: U
authors.initials: U
authors.lastname: Michon-Pasturel
authors.forename: E
authors.initials: E
authors.lastname: Hachulla
authors.forename: B
authors.initials: B
authors.lastname: Devulder
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D017675:CREST Syndrome / Q000209:etiology* / Q000473:pathology; D002503:Centromere / Q000235:genetics / Q000276:immunology; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011658:Pulmonary Fibrosis / Q000209:etiology / Q000473:pathology; D012189:Retrospective Studies; D012595:Scleroderma, Systemic / Q000150:complications / Q000473:pathology* / Q000503:physiopathology; D012720:Severity of Illness Index; D012859:Sjogren's Syndrome / Q000209:etiology / Q000473:pathology