中国内蒙古武川地区50岁以上中老年人髌股关节炎发病率及性别年龄分布特征研究

目的 探讨髌股关节炎的诊断标准,明确髌股关节炎的发病率及分布特征.方法 本研究针对内蒙古武川县50岁以上中老年人群,按整群抽样方法进行标准化问卷调查及影像学检查,由专业培训医生按膝关节X线轴位片骨关节炎Kellgren & Lawrence分度要点阅片评分.具体定义影像学髌股关节炎(RPFA)和症状学髌股关节骨关节炎(SPFA)诊断标准,采用Excel、SPSS 14.0等软件按Frequencies,Crosstabs χ~2检验等方法进行统计分析.结果 本次研究获得1025份完整样本,2050例膝关节轴位片.其中RPFA发病率为8.7%,男性6.8%,女性10.5%;SPFA发病率为6.33%,男性为4.8%,女性为8.0%.年龄分组研究中50～、60～、≥70岁组RPFA发病率分别为3.8%、10.6%、22.9%;SPFA发病率分别为2.7%,7.7%、17.3%.3个年龄组SPFA/RPFA分别为71.7%,72.0%,75.6%.体质量分组研究中体质量指数(BMI)<18.5、18.5～、23.0～、≥25.0 kg/m2组RPFA发病率分别为6.0%、7.3%、11.0%、11.3%,SPFA发病率分别为4.2%、5.2%、7.3%、9.6%;4个体质量指数组SPFA/RPFA分别为70.0%,71.3%.66.7%,84.8%.RPFA样本中有疼痛症状的占73.6%.结论 中国内蒙古农村50岁以上中老年人髌股关节炎的发病率为6.3%,女性高于男性.随年龄增长,BMI值增大发病率逐渐增加,且RPFA中出现疼痛症状的比例也有增长.部分RPFA没有疼痛症状.

Epidemiology study on the incidence and distribution of the patellofemoral arthritis in 50-year-old people in Wuchuan region of Inner Mongolia of China

Objective To identify the diagnostic criteria and investigate the incidence and distribution of the patellofemoral arthritis in aged people in Wuchuan region of the Inner Mongolia of China. Methods A population-based cross-sectional survey was conducted among 1030 residents aged 50 years and over of Wuehuan County, Inner Mongolia. Survey participants, mostly farmers, reported heavy physical activity, completed an interview-based questionnaire and Skyline View weight-bearing films were evaluated for KeU-gren and Lawrence (K/L) grade. Radiological patellofemoral arthritis (RPFA) and symptomatic patellofemoral arthritis (SPFA) were defined. Statistical package SPSS 14.0, crosstabs chi-squae test and Excel were adopted for statistical analysis. Results One thousanod and twenty-five participants were included in this study and 2050 knee joint Skyline View weight-bearing films were analyzed. The incidence of RPFA was 8.72%(6.8% in men, and 10.5% inwomen). The incidence of SPFA was 6.33% (4.8% in men, and 8.0% in women).The RPFA incidence of age groups 50～, 60～,≥70 was 3.8%, 10.6%, 22.9% respectively, while the incidence of SPFA was 2.7%, 7.7%, 17.3% respectively. The Three age groups' SPFA/RPFA was 71.7%, 72.0%, 75.6% respectively. The incidence of RPFA was 6.00/0, 7.3%, 11.0%, 11.3%, and the incidence of SPFA was 4.2%,5.2%, 7.3%, 9.6% and the four SPFA/RPFA was 70.0%, 71.3%, 66.7%, 84.8% in people whose BMI was less than 18.5, 18.5～, 23.0～ and higher than ≥25.0 kg/m~2 respectively, 73.6% people had joint pain among RPFA.Conclusion The prevalence of symptomatic patellofemoral arthritis in the rural areas of China is 6.8%, the incidence of that in women is higher than in men, and elder people suffer a high incidence. And the heavier the people are, the higher the incidence of patellofemoral arthritis.