Frequent development of chronic obstructive pulmonary disease in primary SS--results of a longitudinal follow-up.

Research output: Contribution to journalArticle


Objectives. To study the longitudinal development of pulmonary function in patients with primary SS (pSS) and its association with respiratory symptoms, pulmonary radiographic findings and clinical features of pSS.Methods. Forty-one pSS patients, previously evaluated by pulmonary function tests (PFTs), were included in the study. The patients were studied at baseline and follow-up by PFT and at follow-up also by high-resolution CT scan of the lungs, the St George's Respiratory Questionnaire and by inflammatory and serological tests. The PFT results were compared with previously studied population-based controls, standardizing results with regard to gender, age, height, weight and tobacco consumption.Results. The mean follow-up time was 11 years. The pSS patients displayed signs of both obstructive and restrictive lung disease at baseline and at follow-up, and deteriorated in forced expiratory volume in 1 s (FEV(1)), ratio of FEV(1) to vital capacity and in diffusing capacity for carbon monoxide during follow-up. Chronic obstructive pulmonary disease (COPD) was diagnosed in 37% of the pSS patients at follow-up. In pSS patients, respiratory symptoms and radiographic abnormalities were common, although with a poor association with PFT variables.Conclusion. The pSS patients showed signs of both obstructive and restrictive pulmonary disease and COPD commonly developed during follow-up. Respiratory symptoms and radiographic abnormalities were common but poorly associated with PFT in pSS patients.


Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Rheumatology and Autoimmunity


  • primary Sjogren's syndrome, pulmonary function, follow-up study
Original languageEnglish
Pages (from-to)941-946
Issue number5
Publication statusPublished - 2012
Publication categoryResearch