An optimized ^(13)C-urea breath test for the diagnosis of H pylori infection

AIM： To validate an optimized ^13C-urea breath test （^13C-UBT） protocol for the diagnosis of H pylori infection that is cost-efficient and maintains excellent diagnostic accuracy. METHODS： 70 healthy volunteers were tested with two simplified ^13C-UBT protocols, with test meal （Protocol 2） and without test meal （Protocol 1）. Breath samples were collected at 10, 20 and 30 rain after ingestion of 50 mg ^13C-urea dissolved in 10 mL of water, taken as a single swallow, followed by 200 mL of water （pH 6.0） and a circular motion around the waistline to homogenize the urea solution. Performance of both protocols was analyzed at various cut-off values. Results were validated against the European protocol. RESULTS： According to the reference protocol, 65.7% individuals were positive for H pylori infection and 34.3% were negative. There were no significant differences in the ability of both protocols to correctly identify positive and negative H pylori individuals. However, only Protocol 1 with no test meal achieved accuracy, sensitivity, specificity, positive and negative predictive values of 100%. The highest values achieved by Protocol 2 were 98.57%, 97.83%, 100%, 100% and 100%, respectively.CONCLUSION： A 10 min, 50 mg ^13C-UBT with no test meal using a cut-off value of 2-2.5 is a highly accurate test for the diagnosis of H pylori infection at a reduced cost.

Capsule ^(13)C-urea breath test for the diagnosis of Helicobacter pylori infection

AIM: To compare the accuracy of capsule 13C-urea breath test (UBT) with conventional invasive methods for the diagnosis of Helicobacter pylori infection.METHODS: One hundred patients received CLO test,histological examination, culture and 100- or 50-mg capsule UBT for the diagnosis of Hpyloriinfection. Hpylori infection was defined as those with positive culture or positive results from both histology and CLO test.RESULTS: Both the sensitivity and specificity of the 100-mg capsule UBT (n = 50) were 100%. The sensitivity and specificity of the 50-mg capsule UBT (n = 50) were 96.4and 100%, respectively. Taken together, the accuracy of capsule UBT (n=100) was higher than that of CLO test,histology and culture (100% vs 92%, 91% and 89%,respectively; P= 0.035, 0.018 and 0.005, respectively). Our data showed that the optimal timing of sampling for 100-and 50-mg capsule UBT was 15-30 and 6-15 min, respectively.CONCLUSION: Capsule UBT has a higher accuracy compared with biopsy-based tests. It is an ideal method for the diagnosis of Hpyloriinfection.

Cost effectiveness analysis of population-based serology screening and ^(13)C-Urea breath test for Helicobacter pylori to prevent gastric cancer:A markov model

AIM:To compare the costs and effectiveness of no screening and no eradication therapy, the population- based Helicobacter pylori (H pylori) serology screening with eradication therapy and 13C-Urea breath test (UBT) with eradication therapy. METHODS:A Markov model simulation was carried out in all 237 900 Chinese males with age between 35 and 44 from the perspective of the public healthcare provider in Singapore. The main outcome measures were the costs, number of gastric cancer cases prevented, life years saved, and quality-adjusted life years (QALYs) gained from screening age to death. The uncertainty surrounding the cost-effectiveness ratio was addressed by one-way sensitivity analyses. RESULTS:Compared to no screening, the incremental cost-effectiveness ratio (ICER) was $16 166 per life year saved or $13 571 per QALY gained for the serology screening, and $38 792 per life year saved and $32 525 per QALY gained for the UBT. The ICER was $477 079 per life year saved or $390 337 per QALY gained for the UBT compared to the serology screening. The cost- effectiveness of serology screening over the UBT was robust to most parameters in the model. CONCLUSION:The population-based serologyscreening for H pylori was more cost-effective than the UBT in prevention of gastric cancer in Singapore Chinese males.

Effect of posture on ^(13)C-urea breath test in partial gastrectomy patients

AIM: To investigate whether posture affects the accuracy of 13C-urea breath test(13C-UBT) for Helicobacter pylori(H. pylori) detection in partial gastrectomy patients. METHODS: We studied 156 consecutive residual stomach patients, including 76 with H. pylori infection(infection group) and 80 without H. pylori infection(control group). H. pylori infection was confirmed if both the rapid urease test and histology were positive during gastroscopy. The two groups were divided into four subgroups according to patients' posture during the 13C-UBT: subgroup A, sitting position; subgroup B, supine position; subgroup C, right lateral recumbent position; and subgroup D, left lateral recumbent position. Each subject underwent the following modified 13C-UBT: 75 mg of 13C-urea(powder) in 100 m L of citric acid solution was administered, and a mouth wash was performed immediately; breath samples were then collected at baseline and at 5-min intervals up to 30 min while the position was maintained. Seven breathsamples were collected for each subject. The cutoff value was 2.0‰.RESULTS: The mean delta over baseline(DOB) values in the subgroups of the infection group were similar at 5 min(P > 0.05) and significantly higher than those in the corresponding control subgroups at all time points(P < 0.01). In the infection group, the mean DOB values in subgroup A were higher than those in other subgroups within 10 min and peaked at the 10-min point(12.4‰± 2.4‰). The values in subgroups B and C both reached their peaks at 15 min(B, 13.9‰± 1.5‰; C, 12.2‰± 1.7‰) and then decreased gradually until the 30-min point. In subgroup D, the value peaked at 20 min(14.7‰± 1.7‰). Significant differences were found between the values in subgroups D and B at both 25 min(t = 2.093, P = 0.043) and 30 min(t = 2.141, P = 0.039). At 30 min, the value in subgroup D was also significantly different from those in subgroups A and C(D vs C: t = 6.325, P = 0.000; D vs A: t = 5.912, P = 0.000). The mean DOB values of subjects with Billroth Ⅰ anastomosis were higher than those of subjects with Billroth Ⅱ anastomosis irrespectively of the detection time and posture(P > 0.05).CONCLUSION: Utilization of the left lateral recumbent position during the procedure and when collecting the last breath sample may improve the diagnostic accuracy of the 13C-UBT in partial gastrectomy patients.

^(13)C尿素呼气试验检测幽门螺杆菌感染的临床应用

目的探讨^(13)C尿素呼气试验检测幽门螺杆菌感染的临床诊断价值。方法选择2022年1月至2023年7月100例上海未凡医学检验实验室接受检查的上腹部不适患者100例作为研究对象。所有患者均行快速脲酶试验(RUT)和^(13)C尿素呼气试验。以组织学检查作为诊断金标准,比较2种方法对患者各种疾病诊断的准确性、阳性率。对2种方法的诊断性能(灵敏度、特异度、准确性、阴性预测值、阳性预测值)进行评估。结果100例上腹部不适患者中,90例经病理检查确诊。^(13)C尿素呼气试验对十二指肠炎和消化性溃疡的诊断阳性率高于RUT(P<0.05)。2种方法对胃息肉、慢性胃炎、胃癌的诊断阳性率比较,差异无统计学意义(P>0.05)。与RUT相比,^(13)C尿素呼气试验具有更高的灵敏度、特异度、准确性、阳性预测值和阴性预测值。2种方法的特异度、准确性差异有统计学意义(P<0.05),而敏感性、阴性预测值、阳性预测值差异无统计学意义(P>0.05)。结论^(13)C尿素呼气试验和RUT均是检测幽门螺杆菌感染的有效诊断方法,但^(13)C尿素呼气试验具有更高的诊断阳性率和整体诊断效能。

Prognostic value of ^(13)C-phenylalanine breath test on predicting survival in patients with chronic liver failure

AIM: To evaluate the prognostic value of percentage of 13C-phenylalanine oxidation (13C-PheOx) obtained by 13C-phenylalanine breath test (13C-PheBT) on the survival of patients with chronic liver failure. METHODS: The hepatic function was determined by standard liver blood tests and the percentage of 13C-PheOx in 118 chronic liver failure patients. The follow-up period was of 64 mo. Survival analysis was performed by the Kaplan-Meier method and variables that were significant (P < 0.10) in univariate analysis and subsequently introduced in a multivariate analysis according to the hazard model proposed by Cox. RESULTS: Forty-one patients died due to progressive liver failure during the follow-up period. The probability of survival at 12, 24, 36, 48 and 64 mo was 0.88, 0.78, 0.66, 0.57 and 0.19, respectively. Multivariate analysis demonstrated that Child-Pugh classes, age, creatinine and the percentage of 13C-PheOx (HR 0.338, 95% CI: 0.150-0.762, P = 0.009) were independent predictors of survival. When Child-Pugh classes were replaced by all the parameters of the score, only albumin, bilirubin, creatinine, age and the percentage of 13C-PheOx (HR 0.449, 95% CI: 0.206-0.979, P = 0.034) were found to be independent predictors of survival.CONCLUSION: Percentage of 13C-PheOx obtained by 13C-PheBT is a strong predictor of survival in patients with chronic liver disease.

^(13)C-尿素呼气试验在不同年龄段儿童幽门螺杆菌感染中的诊断价值分析

目的探讨^(13)C-尿素呼气试验(^(13)C-UBT)在不同年龄段儿童幽门螺杆菌(Hp)感染中的诊断价值。方法228例疑似Hp感染患儿,将2~5岁患儿作为A组(62例),将6~17岁患儿作为B组(166例)。所有患儿均进行胃镜检查以及^(13)C-UBT、快速尿素酶试验(RUT)、Hp粪便抗原检测。记录所有患儿Hp感染情况;比较A组与B组患儿胃内胆汁反流发生情况,^(13)C-UBT假阴性与真阳性患儿胃内胆汁反流发生情况以及^(13)C-UBT检测Hp阳性的敏感度、特异度和准确度。结果联合检测Hp感染率86.4%(197/228)高于^(13)C-UBT检出阳性率65.4%(149/228),差异有统计学意义(P<0.05)。197例Hp感染患儿中胃内胆汁反流发生率为15.7%(31/197),其中B组胃内胆汁反流发生率为20.1%(28/139),高于A组的5.2%(3/58),差异具有统计学意义(P<0.05)。228例患儿中^(13)C-UBT检测Hp的敏感度为75.6%,特异度为96.8%,准确度为78.5%,阳性预测值为99.3%(149/150),阴性预测值为38.5%(30/78)。A组中^(13)C-UBT检测Hp的敏感度89.7%和准确度90.3%均明显高于B组的69.8%、74.1%,差异均具有统计学意义(P<0.05);两组的特异度比较,差异无统计学意义(P>0.05)。在^(13)C-UBT假阴性患儿中胆汁反流发生率35.4%(17/48)明显高于^(13)C-UBT真阳性患儿的9.4%(14/149),差异有统计学意义(P<0.05)。结论^(13)C-UBT在儿童Hp感染检测中的特异性和阳性预测值均较高,尤其在2~5岁儿童中具有相对较高的敏感度和准确度,对于^(13)C-UBT检测为阴性而临床疑似Hp感染的患儿,应联合其他检测方法进一步检查确诊,避免漏诊发生。

四位一体知信行健康教育模式在儿童^(13)C-尿素呼气试验检测中的应用研究

目的探讨四位一体知信行健康教育模式在儿童13C-尿素呼气试验检测中的应用效果。方法选择2021年7月一2022年2月于广西壮族自治区妇幼保健院就诊的300名儿童,以随机数字表法分为2组,各150名,对照组采用常规健康教育指导,试验组采用四位一体知信行行为理论健康教育模式指导。对比分析2组^(13)C一尿素呼气试验检测吹气方法的掌握率、依从性、家属满意度。结果试验组的^(13)C一尿素呼气试验检测吹气方法的掌握率、依从性、家属满意度均高于对照组,差异有统计学意义(P<0.05)。结论将四位一体知信行健康教育模式应用于儿童^(13)C一尿素呼气试验检测可有效提高儿童依从率及家长满意度,值得推广。

胃蛋白酶原、胃泌素17联合^(13)C尿素呼气试验在早期胃癌筛查中的应用

目的探讨胃蛋白酶原Ⅰ(PGⅠ)、胃蛋白酶原Ⅱ(PGⅡ)、胃泌素17(G-17)联合^(13)C-尿素呼气试验(^(13)C-UBT)检测在早期胃癌筛查中的应用价值。方法选取2019年6月—2022年6月因消化道症状在武汉市第一医院接受胃镜和病理学检查的156例患者,根据组织病理学诊断结果分为非萎缩性胃炎组(37例)、萎缩性胃炎组(21例)、早期胃癌组(24例)、进展期胃癌组(37例)和胃溃疡组(37例)。采用酶联免疫吸附法检测各组患者的血清PGⅠ、PGⅡ、G-17水平,采用^(13)C-UBT试验检测幽门螺杆菌(Hp)感染情况。结果5组患者血清PGⅠ、G-17水平和Hp感染率比较,差异均有统计学意义(P<0.05);5组患者血清PGⅡ水平比较,差异无统计学意义(P>0.05)。受试者工作特征(ROC)曲线分析结果显示,血清PGⅡ诊断早期胃癌的曲线下面积(AUC)为0.405(95%CI:0.228~0.582,P>0.05);血清PGⅠ、G-17及Hp感染诊断早期胃癌的AUC分别为0.815、0.709、0.649(95%CI:0.669~0.961、0.538~0.880、0.481~0.817,均P<0.001);血清PGⅠ、G-17及Hp感染联合检测诊断早期胃癌的AUC为0.874(95%CI:0.731~0.982,P<0.001),敏感度为89.5%,特异度为60.31%。结论血清PGⅠ、G-17及^(13)C-UBT检测对早期胃癌筛查具有重要的预警作用,联合检测可提高早期胃癌诊断准确率。

^(13)C尿素呼气试验DOB值与上消化道疾病的相关性

目的探究^(13)C尿素呼气试验超级准值(^(13)C-UBT DOB值)与上消化道疾病类型及慢性萎缩性胃炎(CAG)胃黏膜病理分级的关系。方法回顾性选取^(13)C-UBT阳性(DOB≥4.0‰)同时完善胃镜检查的596例患者,纳入呈阴性(DOB<4.0‰)诊断为CAG患者25例作为对照,分析DOB值与上消化道疾病类型及CAG胃黏膜病理分级的相关性。结果入组患者中女性DOB值显著高于男性,DOB值与上消化道疾病类型的关系有统计学意义,慢性胃炎、消化性溃疡、胃癌的DOB值呈下降趋势。DOB值与胃黏膜萎缩、肠化程度差异具有统计学意义,中度及以上萎缩、肠化患者,DOB值呈下降趋势;与炎症、炎症活动性程度未见相关性,说明DOB值不能预测疾病及胃黏膜损伤的严重程度,对于低DOB值患者同样需要重视。结论DOB值定量对于临床中推测上消化道疾病、胃黏膜损伤程度有一定价值,但不能作为诊断Hp感染相关疾病及判断胃黏膜损伤程度的依据。

^(13)C-尿素呼吸试验对儿童幽门螺杆菌感染根除后1年的随访

目的 探讨洛赛克、克拉霉素、阿莫西林三联根除儿童幽门螺杆菌 (Hp)感染的远近期疗效。 方法 经1 3C尿素呼吸试验 (1 3C UBT)及血清Hp IgG测定 2项阳性的反复腹痛儿 95例 ,随机分为治疗组 (60例 )与安慰剂组 (35例 ) ,治疗组接受洛赛克 0 .8mg/ (kg·d) ,每天一次 ,克拉霉素 1 5mg/ (kg·d) ,每天 2次 ,阿莫西林 30mg/ (kg·d) ,每天 3次 ,三联口服治疗 ;疗程 1周。停药后 1 ,3 ,6 ,1 2个月门诊随访 ,复查1 3C UBT及Hp IgG。 结果 1 .治疗组停药后 4周腹痛的总有效率 96 .7% ,而安慰剂组仅 34 .6 % ;治疗组Hp根除率为 90 % ,明显高于安慰剂组 1 4 .3 %。 2 .治疗组Hp根除后 3 ,6 ,1 2个月复查Hp再感染率分别为 1 .85 %、1 .85 %、3 .57%。 结论 1 .洛赛克等三联根除反复腹痛儿Hp感染临床效果显著 ,Hp根除率高 ,远近期疗效均好 ,1年再感染率低。2 .1 3C UBT监测Hp根除情况快捷准确。

^(13)C-尿素呼气试验定量值与胃黏膜病变程度的相关性

目的:探讨13C-尿素呼气试验定量检测值与胃黏膜病变程度的关系.方法:74例患者于1wk内分别测定13C-尿素呼气试验定量检测和行胃镜检查取胃黏膜,进行组织病理学检查,黏膜按标准予以评分.将13C-尿素呼气试验定量值和胃黏膜病理病变评分做相关性分析.结果:13C-尿素呼气试验定量值与胃窦黏膜慢性炎症(r=0.9958,P=0.0001)、萎缩(r=0.2498,P=0.0318)、肠化(r=0.2784,P=0.02)病变程度呈正相关,与其活动性炎症(r=0.1979,P=0.09)病变程度不相关;13C-尿素呼气试验定量值与胃角黏膜活动性炎症(r=0.6223,P=0.0001)、慢性炎症(r=0.5480,P=0.0001)、萎缩(r=0.6014,P=0.0001)病变程度呈正相关,与其肠化(r=0.1308,P=0.27)病变程度不相关;13C-尿素呼气试验定量值与胃体黏膜活动性炎症(r=0.2039,P=0.08)、慢性炎症(r=0.0966,P=0.41)、萎缩(r=0.1369,P=0.24)、肠化(r=0.1837,P=0.12)程度均不相关;13C-尿素呼气试验定量值与全胃黏膜活动性炎症(r=0.9958,P=0.0001)、慢性炎症(r=0.9843,P=0.0001)、萎缩(r=0.9921,P=0.0001)、肠化(r=0.9934,P=0.0001)病变程度均呈正相关.结论:13C-尿素呼气试验定量值与胃黏膜病理病变程度呈正相关,临床上可以根据13C-尿素呼气试验定量值高低考虑黏膜病理病变程度,进而更好地指导临床诊断、用药及预后.

应用^(13)C-尿素呼气试验检测成都市健康体检者胃幽门螺杆菌感染情况分析

目的通过应用13C-尿素呼气试验(13C-urea breath test,C-UBT)对成都市健康体检者开展幽门螺杆菌(Helico-bacter pylori,Hp)检测,比较不同年龄、性别和季节之间Hp阳性感染率的差异,探讨Hp感染分布规律。方法采用13C-UBT检测2400例健康体检人群的Hp感染情况,并按年龄、性别和季节分组,进行统计分析。结果 Hp感染率为44.08%,但性别和季节差异均无统计学意义(P>0.05),而不同年龄组的Hp感染率差异有统计学意义(P<0.05)。结论呼气试验适用于体检人群中Hp感染的检测。应通过健康教育提高人们相关知识水平,从而自觉预防和控制胃部疾病的发生。

幽门螺旋菌检测试剂［^（13）C］尿素的合成

报道了由［１３Ｃ］碳酸钡制成［１３Ｃ］尿素的方法，其产率为７５％。产品经高效液相色谱（ＨＰＬＣ）等分析，纯度优于国外同类产品，质量符合药典规定，并经临床应用于［１３Ｃ］尿素呼气实验检测幽门螺旋菌，获得满意的效果．

^(13)C-尿素呼气试验诊断幽门螺杆菌的临床应用

应用13C-尿素呼气试验(13C-UBT)评估胃镜常规检查幽门螺杆菌(HP)显示为阴性的患者的HP感染情况及根除HP的治疗效果。选择胃镜组织检查及快速尿素酶试验HP阴性的胃肠道疾病患者,以非胃肠道疾病患者为对照组,行13C-UBT检测。对13C-UBT检测HP阳性病例施行根除治疗,治疗后行13C-UBT复查,作为评价疗效指标。结果640例胃镜常规检查HP阴性的患者中,有389例13C-UBT结果为HP阳性,阳性率60.8%。对13C-UBT检测HP阳性病例分别施行PPI三联、PPI二联、单纯PPI治疗,其转阴率分别为83.8%,18.4%,3.3%。三种治疗方案之间有显著性差异(P<0.05)。对于胃镜常规检查显示HP阴性的病例中,应用13C-UBT有助于提高检出率和疗效判断。

^(13)-C尿素呼气试验检测幽门螺杆菌感染的评价

目的 探讨幽门螺杆菌(Helicobacter pylori,HP)感染3 种检测方法的差别及临床价值。方法 62 例胃十二指肠疾病患者同时行胃黏膜病理切片Giemsa染色、13C 尿素呼气试验(13C Urea breath test,13C UBT)、快速尿素酶试验(rapid ureasetest,RUT)检测HP感染。13C UBT、RUT检出HP的阳性率与病理切片Giemsa染色的检出HP阳性率进行比较。结果 40例慢性胃炎患者HP检测阳性率分别是Giemsa染色67 5%、13C UBT 60%、RUT 60%。22例消化性溃疡患者HP检测阳性率分别是Giemsa染色81 .8%、13C UBT 72 7%和RUT 68.1%。各检测方法HP检出阳性率之间统计学上差异无显著性。13C UBT和RUT诊断现症感染准确性分析为90 .3%、90. 3%,敏感性分别是94. 7%、92 .3%,特异性分别是83 3%、87. 0%,阳性预测值分别是90%、92 3%,阴性预测值分别是90 .9%、87. 0%。13C-UBT和RUT的准确性、敏感性、特异性、阳性预测值、阴性预测值之间在统计学上差异无显著性。结论 13C-UBT是一种准确性、特异性、敏感性高、无创性、无放射性的HP感染的诊断方法。

^(13)C尿素呼气试验诊断小儿幽门螺杆菌感染

目的 评价临床各种诊断幽门螺杆菌 ( HP)感染的方法、手段的可靠性与参照性。方法 对 2 0 0例具有消化道症状的患儿进行 1 3 C尿素呼气试验 ,并与胃镜下胃粘膜改变、胃粘膜尿素酶试验、组织学检查及 Giem sa染色、血 HP- Ig G相对照。结果 经统计学处理 ,1 3 C尿素呼气试验与胃粘膜快速尿素酶试验、组织学检查均无显著性差异 ,与特异性抗体检测有显著性差异 ,与胃镜下胃粘膜病变的检出有非常显著性差异。结论 1 3 C尿素呼气试验在诊断小儿 HP感染中具有安全性及可靠性。胃粘膜快速尿素酶试验、组织学检查与 1 3

儿童慢性胃炎患者^(13)C-尿素呼气试验和胃黏膜活体组织检查Hp检测的比较研究

目的:对慢性胃炎儿童患者13C-尿素呼气试验(13C-UBT)和胃黏膜活体组织检查(活检)Hp两种检测方法进行比较分析。方法:选取我院收治的慢性胃炎儿童患者46例,分别进行13C-尿素呼气试验检测和胃黏膜活检Hp检测,并以胃黏膜活检Hp检测结果为标准,比较13C-UBT对幽门螺旋杆菌检出的准确度、特异性和敏感度;并对检测出Hp阳性患者采用质子泵抑制剂(PPI)进行治疗,观察其临床疗效。结果:胃黏膜活检Hp检测结果显示,13C-UBT的准确度、特异性和敏感度分别为97.83%、92.86%和100%,且对Hp阳性患者采用PPI三联疗法治疗的转阴率要显著优于采用单纯PPI和PPI二联疗法的患者,差异有统计学意义(P<0.05)。结论:与胃黏膜活检Hp方法相比,13C-UBT方法在Hp的检出上具有较高的准确度、特异性和敏感度,同时操作简单、对人体无害和非侵入性等优点,是儿童Hp感染慢性胃炎的理想诊断方法,值得在儿科推广和应用。

^(13)C-尿素呼气试验诊断幽门螺杆菌感染的研究

本研究旨在评估^(13)C,尿素呼气试验检测幽门螺杆菌感染的可靠性。方法:我们在82例因胃病而行胃镜检查的患者胃窦和胃体取多个活检标本,作组织学、牯膜涂片和快速尿素酶试验,以决定是否感染幽门螺杆菌,并作^(13)C-尿素呼气试验。^(13)C-尿素呼气试验的敏感性、特异性、阳性预测值、阴性预测值是与组织学和尿素酶方法检测幽门螺杆菌的结果比较而计算得到。结果:^(13)C-尿素呼气试验的敏感性97.92％,特异性100％,阳性预测值100％,阴性预测值97.14％,准确性98.78％。结论:^(13)C-尿素呼气试验有高度敏感性和特异性,对确定患者的幽门螺杆菌感染状态是一可靠的无创伤的诊断方法。

^(13)C-尿素呼气试验检测胃癌患者幽门螺杆菌感染的结果分析

目的 :13 C 尿素呼气试验 (13 C UBT)检测幽门螺杆菌 (HP)感染并探讨与胃癌的关系。方法 :术前3天及手术后 10天对 5 3例胃癌病人进行13 C UBT检测并与 36例健康人群对照 ,以探讨胃癌病人HP的感染率。结果 :HP感染率健康对照组为 0 ,早期胃癌组为 75 .0 % ,中晚期胃癌组为 6 5 .8% (P <0 .0 5 )。结论 :HP感染是胃癌发生序列过程中的重要触发因子 ,在早期胃癌的发生中起重要作用。