随机尿、晨尿与24 h尿生化指标的相关性分析

目的:研究分别用肌酐和渗透压校正随机尿、晨尿中的常规生化指标与24 h尿中对应指标含量的相关性。方法:收集患者同一天内的24 h尿、晨尿和随机尿,分别测定三种不同类型尿液中的蛋白、电解质(钾、钠、氯)、和尿酸UA的含量,其中晨尿和随机尿的结果分别以肌酐比值和渗透压比值表示,用SPSS11.5软件进行数据处理和秩相关分析。结果:随机尿、晨尿尿蛋白/尿肌酐比值和尿蛋白/尿渗透压比值与24 h尿蛋白定量结果相关性良好(P<0.05),相关系数约为0.8;随机尿、晨尿尿电解质/尿肌酐比值和尿电解质/尿渗透压比值与24 h尿电解质的相关性较差;随机尿、晨尿尿酸校正后没有相关性。结论:晨尿和随机尿尿蛋白/尿肌酐比值代替24 h尿蛋白的测定有标本收集方便易行的优势;用肌酐校正随机尿、晨尿尿电解质的临床评价有待进一步的研究;尿酸的测定仍须采用24 h尿标本。而晨尿、随机尿用渗透压做校正效果与肌酐校正一致。     

晨尿尿蛋白/尿肌酐比值评估狼疮性肾炎患者尿蛋白的效果

目的探讨狼疮性肾炎(LN)患者采用晨尿尿蛋白/尿肌酐比值(UPCR)预测24 h尿蛋白定量的有效性。方法纳入本院风湿免疫科住院治疗的LN患者136例,根据24 h尿蛋白定量、血清肌酐水平分为亚组,将患者UPCR与24 h尿蛋白定量行Pearson相关性分析,采用受试者工作曲线(ROC曲线),根据最佳敏感性和特异性确定UPCR诊断界点。结果晨尿UPCR和24 h尿蛋白定量呈显著正相关(r=0.899,P0.01)。24 h尿蛋白定量为0.5、1.0、2.0、3.0、4.0和5.0 g对应的UPCR诊断界值分别为0.4、1.0、2.04、2.44、3.37和4.65。结论晨尿UPCR与24 h尿蛋白定量具有良好的相关性。     

晨尿总蛋白与尿肌酐比值测定在成人慢性肾脏病中的应用

目的应用晨尿总蛋白与尿肌酐比值评估慢性肾脏病患者尿蛋白排泄率。方法对480例不同肾小球滤过率(GFR)水平的成人慢性肾脏病患者进行晨尿总蛋白与尿肌酐比值测定,并与24 h尿蛋白定量进行相关性分析;采用ROC曲线分析GFR≥10 ml/min患者的晨尿总蛋白与尿肌酐比值相对于24 h尿蛋白定量为0.5 g/24 h、1.0 g/24 h、2.0 g/24 h及3.5 g/24 h的诊断界点。结果 GFR≥10ml/min的慢性肾脏病患者晨尿总蛋白与尿肌酐比值与24 h尿蛋白定量高度正相关(r=0.853,P<0.01)。晨尿总蛋白与尿肌酐比值对应24 h尿蛋白定量为0.5 g/24 h、1.0 g/24 h、2.0 g/24 h及3.5 g/24 h的最佳诊断界点分别为0.46、1.05、2.08及3.16g/gCr。结论在GFR≥10 ml/min的成人慢性肾脏病患者,晨尿总蛋白与尿肌酐比值可替代24 h尿蛋白定量应用于慢性肾脏病患者的蛋白尿定量测定。     

随机尿蛋白与血清胱抑素C比值与24 h尿蛋白定量的相关性研究

目的 研究随机尿蛋白/血清胱抑素C比值与24 h尿蛋白定量的相关性.方法 对74例不同肾脏疾病和不同程度肾功能的患者进行24 h尿蛋白定量和随机尿蛋白/血清胱抑素C比值、随机尿蛋白/尿肌酐比值、随机尿蛋白/尿渗透压比值的相关分析.结果 随机尿蛋白/血清胱抑素C比值、随机尿蛋白/尿肌酐比值、随机尿蛋白/尿渗透压比值与24 h尿蛋白定量具有高度相关,相关系数分别为0.786(P＜0.01)、0.698(P＜0.05)、0.723(P＜0.01).结论 随机尿蛋白/血清胱抑素C比值可替代24h尿蛋白定量.     

肾病患者24h尿蛋白定量与尿蛋白的相关性研究及临床应用

目的探讨24h尿蛋白定量与尿蛋白的相关性。方法选择136例肾病患者,嘱其在规定的时间内分别收集晨尿的中段尿以及当天的24h内尿标本各一份,检测24h尿标本中尿蛋白的含量、尿肌酐、尿丙氨酸氨基肽酶（AAP）、尿N-乙酰-β-D-氨基葡萄糖苷酶（NAG）以及尿半乳糖苷酶（GAL）,分别比较不同轻重程度蛋白尿中所含物质的相关性,并用尿蛋白/肌酐值来估算24h尿蛋白量的准确性。结果根据24h尿蛋白定量检测结果,将患者按尿蛋白量分为正常尿蛋白组（n=36,尿蛋白小于0.15g）、轻度蛋白尿组（n=55,尿蛋白0.15-0.35g）及重度蛋白尿组（n=45,尿蛋白大于0.35g）。A、B、C三组中尿蛋白/尿肌酐与24h尿蛋白量具有一定的相关性,而组间比较,不具有相关性（P〉0.05）。在24h尿液检测中,AAP、NAC、GAL浓度与尿蛋白/尿肌酐比值不具有相关性（P〉0.05）。用尿蛋白/尿肌酐的值来估算24h尿蛋白含量的准确性发现,在落入24h尿蛋白定量30%的区域范围内的有56例（41%）,以YA、YB、YC方程测量的落入24h尿蛋白量30%区域范围内的P/C值有47例（35%）,而用Y总方程测量的落入24h尿蛋白量30%区域范围内的尿蛋白/尿肌酐有48例（35%）。结论尿蛋白/尿肌酐与24h尿蛋白量的测定具有很高的相关性,可用晨尿中的尿蛋白/尿肌酐来检测患者蛋白尿的情况。     

晨尿和随机尿白蛋白肌酐比与尿蛋白定量在子痫前期的相关性分析

目的探讨子痫前期尿蛋白定量与晨尿和随机尿白蛋白肌酐的相关性。方法选取80例子痫前期患者作研究对象,均为我院2012年1月-2013年2月收治,对24h尿蛋白定量、随机尿ACR、晨尿ACR的相关性进行比较。结果尿蛋白平均5.9±2.5g/24h。随机ACR平均585.3±263.4mg/mmol,晨尿ACR平均572.7±251.4mg/mmol,24h尿蛋白定量与随机ACR系数（r=9.123）和晨尿ACR系数（r=0.928）具有高度相关性。结论就子痫前期尿ACR在临床诊断中的应用价值国内报道不多,且尿蛋白定量与子痫前期晨尿和随机尿的相关性报道不多。本次就相关内容进行探讨,晨尿ACR和随机尿ACR测定有较小差异,且时间相关限制较小,故随机尿ACR临床使用价值更显著,在临床可推广使用。     

Afinion ACR 检测试剂盒测定随机尿微量清蛋白／尿肌酐比值的应用

目的：评价 Afinion ACR 检测试剂盒在早期肾损害时测定随机尿微量清蛋白/尿肌酐比值（UmAlb/Cr）的应用价值。方法收集门诊和病房患者的随机尿及24 h 尿液标本87例,随机尿检测使用 Afinion AS100分析仪及 Afinion ACR 检测试剂盒进行随机尿微量清蛋白/尿肌酐比值测定,24 h 尿蛋白（24 h UmAlb）使用 HI-TACH17600-020日立全自动生化分析仪,北京利德曼生化技术有限公司尿微量清蛋白试剂盒进行测定。结果Afinion AS100分析仪随机检测尿尿微量清蛋白/尿肌酐比值与 HITACH17600-020日立全自动生化分析仪检测24 h 尿蛋白定量结果相关性良好。结论早期肾损害时用 Afinion AS100分析仪及 Afinion ACR 检测试剂盒是测定尿微量清蛋白/尿肌酐比值快速可靠的初筛方法。     

尿蛋白与尿肌酐之比测定尿蛋白的可靠性分析

目的:探讨随意尿蛋白/尿肌酐与24 h尿蛋白之间的关系.方法:随机选择2007年我科住院患者92例,对其随意尿蛋白/尿肌酐与24 h尿蛋白定量进行相关回归分析.结果:92例具有不同程度肾功能及蛋白尿的原发或继发肾脏疾病患者,他们的随意尿尿蛋白/尿肌酐均与24 h尿蛋白定量呈高度直线相关.结论:随意尿尿蛋白/尿肌酐是测定尿蛋白的简单而且可靠的方法,该法不受患者的肾功能及尿蛋白多少的影响.     

尿蛋白/尿肌酐与24小时尿蛋白定量相关性分析及临床应用

目的探讨随意尿尿蛋白/尿肌酐(Upro/Ucr)可否替代24h尿蛋白定量(24hpro),监测尿蛋白的排泄情况。方法选取该院住院及门诊肾脏病患者96例,共119例尿标本,将随意尿Upro/Ucr与24h尿蛋白定量进行相关性分析;采用ROC曲线分析确定随意尿Upro/Ucr相对于24hpro≥0.15g和24hpro≥1.00g的最佳诊断点。结果随意尿Upro/Ucr与24h尿蛋白定量呈显著正相关(r=0.83;P<0.001);24hpro≥0.15g和24hpro≥1.00g时,临床诊断敏感性和特异性最佳点分别为Upro/Ucr≥0.20g/gcr和Upro/Ucr≥0.95g/gcr。结论随意尿Upro/Ucr可替代24h尿蛋白定量,监测肾脏病患者尿蛋白排泄情况。     

慢性肾脏病患者晨尿白蛋白肌酐比值与24小时尿蛋白定量关系的研究

目的:探讨慢性肾脏病患者晨尿白蛋白肌酐比值与24小时尿蛋白的定量关系。方法:回顾性分析438例慢性肾脏病患者的临床资料,评价患者晨尿白蛋白肌酐比值与24小时尿蛋白定量结果的一致性,采用线性回归方程模拟两者定量关系,并通过ROC曲线分析晨尿白蛋白肌酐比值诊断肾病综合征的敏感性与特异性。结果:晨尿白蛋白肌酐比值与24小时尿蛋白定量显著正相关(R2=0.880,P0.001),通过线性回归模型,发现晨尿白蛋白肌酐比值2745.4 mg/g即相当于肾综范围蛋白尿(24小时尿蛋白定量3.5 g);与24小时尿蛋白比较,晨尿白蛋白肌酐比值对肾病综合征诊断具有较好的敏感性(85.6%)和特异性(93.8%)。结论:晨尿白蛋白肌酐比值与24小时尿蛋白定量显著相关,同时晨尿白蛋白肌酐比值具备方便、准确等优势,在慢性肾脏病临床诊治中应该得到推广应用。     

Protein:creatinine ratio in random urine samples is a reliable marker of increased 24-hour protein excretion in hospitalized women with hypertensive disorders of pregnancy

BACKGROUND: The protein:creatinine ratio in random, untimed urine samples correlates with 24-h protein excretion in pregnant women with and without hypertension. Nevertheless, whether this ratio is appropriate as a screening test for proteinuria is still unclear, in part because of the paucity of large studies. METHODS: We measured protein:creatinine ratios in random urine samples and protein contents of 24-h urine samples in a cross-sectional study of 927 hospitalized pregnant women at >/=20-weeks of gestational age and in a 2nd cohort of 161 pregnant women. In the 2nd group, urine specimens were obtained before and after completion of the 24-h collections, avoiding 1st-morning void specimens. RESULTS: Protein excretion was >/=300 mg/24 h in 282 patients (30.4%). The urine protein:creatinine ratio and the 24-h protein excretion were significantly correlated (r = 0.98, P <0.001). The protein:creatinine ratio as an indicator of protein excretion >/=300 mg/24 h was >/=0.3. The sensitivity and specificity were 98.2% and 98.8%, respectively. Positive and negative predictive values were 97.2% and 99.2%, respectively, and positive and negative likelihood ratios were 79.2 and 0.02, respectively. The diagnostic accuracy of the urinary protein:creatinine ratio was corroborated in the 2nd cohort of patients, which also showed no statistically significant difference in protein:creatinine ratio between samples obtained >24 h apart. CONCLUSIONS: Random urinary protein:creatinine ratio is a reliable indicator of significant proteinuria (>300 mg/day) in nonambulatory pregnant women, irrespective of sampling time during the daytime. The protein:creatinine ratio may be reasonably used as an alternative to the 24-h urine collection method.     

探讨晨尿蛋白／肌酐比值的诊断界值及临床应用

目的通过调查健康人群和肾病患者晨尿蛋白／肌酐比值,以及肾病患者24小时尿蛋白定量,界定晨尿蛋白／肌酐比值的正常、病理诊断临界值。方法选取临床确诊的住院及门诊肾脏病患者129例,留取其晨尿、24小时尿两份标本,同时进行尿蛋白,尿肌酐的测定,计算晨尿蛋白／肌酐比值,将比值与24小时尿蛋白结果进行相关性分析;同时用受试者工作曲线（receiver operating characteristics,ROc）曲线探讨肾病患者相对于24小时尿蛋白定量,轻度蛋白尿〈1．0g／d,重度蛋白尿〉3．0g／d时,晨尿蛋白／尿肌酐相对应的最佳诊断界点。留取门诊健康人群尿常规检查及镜检结果全阴性,询问无现病史的晨尿标本211人份,测定晨尿蛋白／肌酐比值,相对于129例肾病患者的晨尿蛋白／肌酐比值,用ROC曲线探讨晨尿蛋白／肌酐比值的病理最佳诊断界点。结果晨尿蛋白／肌酐比值与24小时尿蛋白呈显著正相关（r=0．892,P〈0．01）;24小时尿蛋白定量轻度蛋白尿〈1．0g／d,重度蛋白尿〉3．0g／d,晨尿蛋白／尿肌酐（UCr）相对应的最佳诊断界点为〈0．90g／g（敏感度96．2％,特异度86．2％）、〉2．88g／g（敏感度82．9％,特异度85．6％）;无现病史的晨尿标本尿蛋白／尿肌酐比值,相对于肾病患者的晨尿蛋白／肌酐比值,ROC曲线最佳诊断界点为0．23g／g（敏感度82．9％,特异度86．0％）。结论晨尿蛋白／肌酐比值诊断界点可替代24小时尿蛋白定量的检测。     

人群调查中尿白蛋白检测方法的探讨

目的 探讨人群调查中尿白蛋白标本留取及检测方法.方法 选取659名北京市居民,收集其24 h尿测定UAER;并留取次日随机尿和晨尿,分别采用尿ACR及半定量尿白蛋白试纸法测定尿白蛋白.以24 h UAER作为标准,建立应用两种方法检测晨尿和随机尿白蛋白的ROC曲线,比较敏感度、特异度及ROC曲线下面积.结果 晨尿和随机尿ACR分别为9.36(5.12～33.29)mg/g及11.29(6.34～41.29)mg/g,组间比较差异无统计学意义(t=-1.382,P＞0.05),相关分析显示两者高度相关(r=0.932,P＜0.01).晨尿和随机尿ACR与24 h UAER具有高度相关性,相关系数分别为0.853及0.874,P均＜0.01.随机尿ACR诊断白蛋白尿的敏感度为77.9%,特异度为91.0%,晨尿ACR诊断白蛋白尿的敏感度为78.4%,特异度为95.7%.随机尿白蛋白试纸法诊断白蛋白尿的敏感度为90.3%,特异度为41.1%,特异度明显低于ACR法.随机尿与晨尿ACR的ROC曲线下面积分别为0.918±0.012及0.929±0.015,组间比较差异无统计学意义(χ2=2.13,P＞0.05).随机尿白蛋白试纸法ROC曲线下面积0.661±0.021,低于随机尿ACR(χ2=248.41,P＜0.01).结论 随机尿的ACR兼具简便及准确的特点,是人群调查中诊断白蛋白尿的良好指标.

Abstract：

Objective To evaluate the spot urine sample collection method and value of urinary albumin measurement in population survey. Methods Six hundred and fifty-nine Beijing residents were requested to collect 24 h urine for detection of UAER, as well as random spot urine samples and morning urine samples in the next day. Rapid semi-quantitative urinary albumin-specific dipstick and ACR were measured in each spot urine specimen. The 24 h UAER was measured as golden standard to generate ROC curves and evaluate the sensitivity, specificity and AUC of each method. Results The value of ACR in the morning spot urine samples and random spot urine samples were 9. 36(5. 12-33.29) mg/g and 11.29(6. 34-41.29) mg/g respectively and there was no significant difference between these two groups (t = - 1. 382,P＞0.05). The correlation was significant in the two groups (r = 0.932, P ＜ 0.01). The correlation coefficient between ACR in the morning spot urine samples and UAER was 0. 853 (P ＜ 0. 01). The correlation coefficient between ACR in the random spot urine samples and UAER was 0. 874 (P ＜0. 01).The sensitivity and specificity of ACR for diagnosis of albuminuria in the random urine samples were 77. 9% and 91.0%. The sensitivity and specificity of ACR for diagnosis of albuminuria in the morning urine samples were 78. 4% and 95.7%. Concerning the semi-quantitative urinary albumin-specific dipstick, sensitivity and specificity were 90. 3% and 41.1% , respectively. The specificity was much lower than that of ACR. The area under the ROC curves of ACR in the random urine specimens and the morning urine specimens was 0. 918 ±0. 012, 0. 929 ± 0. 015, respectively. There was no statistical difference between these two groups (χ2 =2. 13, P＞0. 05). The area under the ROC curves of semi-quantitative urinary albumin-specific dipstick in the random urine specimens was 0.661 ±0.021, lower than that of ACR (χ2 = 248.41, P＜0.01).Conclusion Measurement of ACR in random urine samples is a reasonable method with simplicity and accuracy for the detection of albuminuria in general population screening program.     

胡桃夹综合征患者不同体位尿蛋白定量检测的日内变异分析

目的报道2例胡桃夹综合征患者随机尿微量清蛋白肌酐比(ACR)、总蛋白肌酐比(PCR)与24 h尿总蛋白定量(24hUTP)结果不一致的临床案例,并分析患者不同体位时随机尿蛋白的日内变异。方法用多普勒超声确诊2位患者为胡桃夹综合征,留取2位患者不同体位(平卧、正常活动)24 h期间所有尿标本,检测ACR、PCR、24hUTP,分析不同体位下ACR、PCR的变异及与24hUTP的一致性。结果平卧期间,2位患者随机尿ACR、PCR和24hUTP均在参考区间内,结果均一致;正常活动期间,2位患者随机尿ACR和PCR都有个别异常升高超出参考区间,24hUTP分别是0.21 g/24 h和0.05 g/24 h,结果严重不一致。结论胡桃夹综合征会引起体位性蛋白尿,从而导致患者随机尿蛋白日内变异较大,出现个别随机尿蛋白与24hUTP结果不一致的情况,建议患者用晨起第1次尿和24 h尿来监测尿蛋白的排泄情况。     

Classification of renal proteinuria: a simple algorithm.

Total protein, albumin, alpha1-microglobulin, and immunoglobulin G (IgG) were analyzed in 1,622 urine samples without Bence-Jones proteinuria or gross hematuria. There was correlation with the histological picture obtained on renal biopsy in 61 patients. We established 24-h reference intervals for alpha1-microglobulin and IgG on 659 urine samples with total protein and albumin excretion rates below 100 mg/24 h and 30 mg/24 h, respectively, and creatinine clearance above 80 ml/min. The central 95% reference interval was found to be between 4 and 17 mg/24 h for alpha1-microglobulin and between 3 and 8.5 mg/24 h for IgG. In 80 urine samples with albumin excretion rate above 30 mg/24 h and alpha1-microglobulin and IgG within their reference intervals, we analyzed the 95% central interval of the distribution of the IgG/albumin ratios, and it was found to be within 0.01 and 0.20 (0.90 confidence interval: 0.17-0.24). Proteinuria was considered to be of the selective glomerular type if the albumin excretion rate was abnormal and the IgG/albumin ratio was under 0.20, even when the IgG excretion was within a pathological range. For the classification of proteinuria as predominantly tubular, we estimated the alpha1-microglobulin/albumin ratio in 173 urine samples with normal excretion rates of albumin and IgG and pathological excretion of alpha1-microglobulin. The discriminating value of 0.91 (0.90 confidence interval: 0.78-1.08) was accepted in order to define proteinuria of a tubular origin in the presence of a pathological albumin excretion rate. The association between albumin and IgG excretion rates and tubular reabsorption of the alpha1-microglobulin normally filtered by the glomerulus was studied in 33 urine samples from patients with no histologically significant tubulo-interstitial or vascular disease and a serum creatinine concentration below 141 pmol/l. The optimal curve-fitting function between albumin plus IgG and alpha1-microglobulin excretion rates was of the quadratic type (r = 0.927). Mixed proteinuria was considered when both, albumin and alpha1-microglobulin excretion rates were pathological and could not be included in the previously described groups.     

Protein-to-creatinine ratio in spot urine samples as a predictor of quantitation of proteinuria

BACKGROUND: Normal individuals usually excrete very small amounts of protein in the urine. Persistently increased protein excretion is usually a marker of kidney damage. Quantifying protein in urine is commonly used in the diagnosis of kidney diseases, detection of treatment effects and evaluation of prognosis. We evaluated the use of the total protein-to-creatinine ratio (P/C) in spot urine specimens as a predictor of urine protein excretion in 24-h collections. METHODS: The correlation between P/C in first morning and random urine specimens and urinary protein excretion in 24-h collections were analyzed. The cutoff value of P/C in first morning urine specimens for screening urinary protein excretion of 1 and 3 g in 24-h collections was determined by receiver operating characteristics (ROC) curve. RESULTS: For patients with Ccr 10 ml/min, the correlation was highly significant. Similar results were obtained for random urine specimens. By ROC curve analysis, the P/C of 0.94 and 2.84 g/gcr in first morning urine specimens represent the best threshold to detect urine protein excretion of 1 and 3 g in 24-h collections, respectively. There is a good correlation between P/C in first morning urine specimens and random urine specimens from inpatients and outpatients. But the P/C in random specimens is significantly higher than that in first morning specimens in outpatients. CONCLUSION: The P/C in spot urine samples could be used as an alternative to urine protein excretion in 24-h collections in patients with Ccr>10 ml/min. The P/C in first morning urine samples is better than that in random specimens, especially for outpatients.     

随机尿清蛋白/尿肌酐比率测定在慢性肾病的应用

目的研究随机尿清蛋白/尿肌酐比率测定在慢性肾病的应用。方法以测定24 h尿蛋白定量为金标准,比较56例蛋白尿阳性慢性肾脏疾病患者和33例蛋白尿阴性非慢性肾脏病患者的尿蛋白定性、随机尿蛋白定量、随机尿清蛋白定量、随机尿蛋白/肌酐比率、随机尿清蛋白/肌酐比率的检测结果,评价尿清蛋白/肌酐比率的灵敏度（S）、特异度（Sp）、似然比（LR）等诊断性能。结果与24 h尿蛋白定量结果比较：随机尿蛋白/肌酐比率,S=0.91、Sp=0.91、阴性预测值（NPV）=0.86、阳性预测值（PPV）=0.94、-LR=0.1、＋LR=10.1、准确性（ACC）=0.91;随机尿清蛋白/肌酐比率,S=0.96、Sp=0.88、NPV=0.94、PPV=0.93、-LR=0.045、＋LR=8.0、ACC=0.93。结论随机尿（清）蛋白/肌酐比率测定可作为筛检24 h尿蛋白定量的常规检测项目。     

2型糖尿病患者微量白蛋白尿临界值的研究

目的研究2型糖尿病(T2DM)患者晨尿、随机尿的尿白蛋白/肌酐比值(ACR)及尿白蛋白(U-Alb)浓度,判定微量白蛋白尿的临界值,以检测早期糖尿病肾脏疾病(DKD)。方法收集169例T2DM患者及40名健康体检者(正常对照组)的24 h尿、晨尿、随机尿,以24 h尿白蛋白排泄率(UAE)为早期DKD的判定标准,分析目前临床应用的晨尿、随机尿的ACR及U-Alb浓度判定微量白蛋白尿的临界值对早期DKD的筛查效能;根据受试者工作特征(ROC)曲线分析,Youden指数最大时对应的晨尿、随机尿的ACR及U-Alb浓度为检测早期DKD微量白蛋白尿的临界值。结果在微量白蛋白尿判定结果中,晨尿ACR与24 h UAE的符合率为43%,UAlb为37%;随机尿ACR为48%,U-Alb为41%,以上4个指标与24 h UAE的判定结果有明显差异(P均0.001)。正常对照组晨尿、随机尿检测结果判定与24 h UAE一致,均为正常。ROC曲线分析显示ACR晨尿临界值为男16 mg/g、女23 mg/g(Youden指数分别为0.70、0.67,阴性预测值分别为97%、100%,阳性预测值分别为72%、65%);ACR随机尿临界值为男17 mg/g、女28 mg/g(Youden指数分别为0.68、0.67,阴性预测值分别为90%、90%,阳性预测值分别为61%、82%);U-Alb晨尿临界值为男16 mg/L、女15 mg/L(Youden指数分别为0.57、0.59,阴性预测值分别为84%、87%,阳性预测值分别为90%、73%);U-Alb随机尿临界值为男17 mg/L、女14 mg/L(Youden指数分别为0.56、0.53,阴性预测值分别为73%、81%,阳性预测值分别为85%、71%)。ACR的最大Youden指数均0.6,且高于相应的U-Alb浓度的Youden指数。结论目前临床应用的晨尿、随机尿微量白蛋白尿的临界值判定T2DM患者早期肾病的漏诊率较高,应重新建立T2DM患者晨尿、随机尿ACR及U-Alb的临界值,以利于DKD的早期防治。