Dept. of Dermatology, Sahlgrenska Sjukhuset, Gothenburg, Sweden.
Scand J Rheumatol. 1987;16(1):293-303. doi: 10.3109/03009747009165382.
In the general population of 39,418 persons within areas in the counties of Norrbotten (BD), Jämtland (Z), Skaraborg (R), Kristianstad west coast (LV), and Kristianstad east coast (L) in Sweden all the inhabitants over the age of seven (in Norrbotten over the age of 14) were investigated for the total number of cases of rheumatoid arthritis. Re-investigations of non-response (10-20 %) were made. The southernmost and northernmost areas were about 1,500 km apart. Every person was examined naked or seminaked. The diagnostic criteria prepared by the American Rheumatism Association (ARA) were used. In the mathematical calculations it was possible to determine indices for correct comparisons of the prevalences in the different areas. The prevalence for RA (classical, definite probable, possible) in the populations examined was 3.1 per cent. The highest figures were observed in the southern part of the country (L, LV). The prevalences were higher in the coastal areas (in L, LV and BD) than in the inland areas (Z, R). The prevalence was higher in the non-response group than in the primarily investigated group.
在瑞典诺尔兰（BD）、耶姆特兰（Z）、斯科讷（R）、克里斯蒂安斯塔德西海岸（LV）和克里斯蒂安斯塔德东海岸（L）的县内 39418 人中，对所有 7 岁以上（在诺尔兰为 14 岁以上）的居民进行了类风湿关节炎总病例数的调查。对未回复者（10-20%）进行了重新调查。最南端和最北端地区相距约 1500 公里。每个人都裸体或半裸体接受检查。使用美国风湿病学会（ARA）制定的诊断标准。在数学计算中，可以确定不同地区流行率的正确比较指标。在所检查的人群中，RA（经典、明确的可能、可能）的患病率为 3.1%。该国南部（L、LV）的发病率最高。沿海地区（L、LV 和 BD）的发病率高于内陆地区（Z、R）。未回复组的患病率高于主要调查组。
