All patients were at least 50 years of age and experienced morning stiffness of less than 30 minutes in duration or crepitus, or both.

• 这些患者每天早晨都会经历短暂的关节僵硬现象（30分钟内），或同时伴有关节摩擦的杂音出现，且经放射线检查确认为退化性膝关节炎。