我们采用同位素超微量免疫放射法测定胰岛素生长因子１(ＩＧＦ—１) ,发现其灵敏度高 ,特异性强 ,重复性好 ,结果稳定 ,对早期诊断糖尿病肾病 (ＤＮ)有实用价值。１对象和方法１．１对象正常对照组：５０例健康自愿者 ,来自本院体检健康者。男性３０例 ,女性２０例。年龄３９～ We measured the IGF-1 by ultra-trace radioimmunoassay and found that it has high sensitivity, specificity, good repeatability and stable results. It has practical value for the early diagnosis of diabetic nephropathy (DN). 1 objects and methods 1.1 object normal control group: 50 healthy volunteers, from our hospital physical examination. 30 males and 20 females. Age 39 ~