1.Clinical Efficacy of Modified Yigongsan Combined with Multi-enzyme Tablets and Bifidobacterium Triple Live Powder in Treatment of Infantile Anorexia with Spleen-Stomach Qi Deficiency Syndrome
Haiyan WANG ; Xiaojing LYU ; Li ZHAO ; Yaqian ZHOU ; Jiaqi CUI ; Yao CUI
Chinese Journal of Experimental Traditional Medical Formulae 2024;30(11):150-155
ObjectiveTo observe the clinical efficacy of modified Yigongsan combined with multi-enzyme tablets and bifidobacterium triple live powder on infantile anorexia with spleen-stomach Qi deficiency syndrome. MethodA total of 112 infantile patients anorexia with spleen-stomach Qi deficiency syndrome treated at Hebei Provincial Hospital of Traditional Chinese Medicine from January 2022 to June 2023 were enrolled and divided into a control group and an observation group, with 56 cases in each group, according to a random number table. Children in the control group were treated with multi-enzyme tablets and Bifidobacterium triple live powder, while those in the observation group were treated with modified Yigongsan in addition to the treatment in the control group. During the study, one case dropped out in the control group and two cases dropped out in the observation group. The clinical efficacy of the two groups of children was compared, including changes in traditional Chinese medicine (TCM) syndrome scores (main symptoms, secondary symptoms, tongue, and pulse), time to restore normal food intake, and increase in body weight. Changes in calcium, iron, zinc levels, hemoglobin, and albumin levels before and after treatment, as well as changes in gastrointestinal hormones such as gastrin and motilin, vasoactive intestinal peptide, somatostatin, neuropeptide Y, orexin, and leptin, were observed. The occurrence of adverse reactions in the two groups of children during the study was also recorded. ResultThe total effective rate of children in the control group after treatment was 85.19% (46/54), while that in the observation group was 98.15% (53/54) (χ2 =5.939, P<0.05). Compared with the control group, the time for food intake to return to normal in the observation group was shorter, and the increase in body weight was greater (P<0.05). Compared with the results before treatment, the TCM syndrome scores (main symptoms, secondary symptoms, tongue, and pulse) in both groups of children significantly decreased, while the levels of calcium, iron, zinc, hemoglobin, albumin, gastrin, motilin, neuropeptide Y, and orexin increased, and the levels of vasoactive intestinal peptide, somatostatin, and leptin decreased (P< 0.01). Compared with the control group after treatment, the improvement in the above indicators in the observation group was more significant (P<0.01). The incidence of adverse reactions in the two groups of children during the treatment period was similar, and the difference was not statistically significant. ConclusionModified Yigongsan combined with multi-enzyme tablets and Bifidobacterium triple live powder is highly effective in treating infantile anorexia (spleen-stomach Qi deficiency syndrome). After treatment, symptoms of the children were improved,appetite and food intake increased, gastrointestinal function was improved, body weight increased, and adverse reactions were few, indicating that the treatment was safe and reliable.
2.Clinical characteristics and outcomes of psoriasis patients with COVID-19: A retrospective, multicenter cohort study in China
Yanhua LIU ; Zhongrui XU ; Jian ZHOU ; Aijun CHEN ; Junling ZHANG ; Xiaojing KANG ; Xian JIANG ; Chengzhi LYU ; Chunrui SHI ; Yuling SHI ; Xiaoming LIU ; Fuqiu LI ; Bin YANG ; Yongmei HUANG ; Chen YU ; Gang WANG
Chinese Medical Journal 2024;137(14):1736-1743
Background::Limited information exists regarding the impact of severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2) infection on psoriasis patients. The objective of this study was to identify clinical factors associated with the prognosis of psoriasis following SARS-CoV-2 infection.Methods::A retrospective, multicenter study was conducted between March and May 2023. Univariable and multivariable logistic regression analyses were employed to identify factors associated with coronavirus disease 2019 (COVID-19)-related psoriasis outcomes. The study included 2371 psoriasis patients from 12 clinical centers, with 2049 of them having been infected with SARS-CoV-2.Results::Among the infected groups, lower exacerbation rates were observed in individuals treated with biologics compared to those receiving traditional systemic or nonsystemic treatments (22.3% [236/1058] vs. 39.8% [92/231] vs. 37.5% [140/373], P <0.001). Psoriasis progression with lesions (adjusted odds ratio [OR] = 8.197, 95% confidence interval [95% CI] = 5.685–11.820, compared to no lesions), hypertension (adjusted OR = 1.582, 95% CI = 1.068–2.343), traditional systemic (adjusted OR = 1.887, 95% CI= 1.263–2.818), and nonsystemic treatment (adjusted OR= 1.602, 95% CI= 1.117–2.297) were found to be associated with exacerbation of psoriasis after SARS-CoV-2 infection, but not biologics (adjusted OR = 0.931, 95% CI = 0.680–1.274, compared to no treatment), according to multivariable logistic regression analysis. Conclusions::A reduced risk of psoriasis exacerbation after SARS-CoV-2 infection was observed with biologics compared to traditional systemic and nonsystemic treatments. Significant risk factors for exacerbation after infection were identified as existing psoriatic lesions and hypertension.
3.Laxation Atherosclerosis of Guizhi Tongluo Tablets by Inhibiting Neutrophil Extracellular Trapping Nets
Qiuyun LYU ; Lin YANG ; Dong SHEN ; Xiaojing HUANG ; Xianmei PAN ; Senjie ZHONG ; Jie CHEN ; Lingjun WANG ; Shaoxiang XIAN ; Wenhua XU ; Hongcheng FANG
Herald of Medicine 2024;43(12):1898-1903
Objective To investigate the mechanism of Guizhi Tongluo Tablets(GZTLP)on improving atherosclerosis in APOE knockout mice by regulating neutrophil extracellular trapping nets(NETs).Methods After modeling,24 APOE knockout mice aged 8 weeks were randomly divided into 4 groups:GZTLP high-dose group,low-dose group,model control group and normal control group,with 6 mice in each group.GZTLP was given 1.87 mg·g-1 and 0.47 mg·g-1 intragastric administration in high-dose group and low-dose group,respectively.The normal control group and model control group were given 0.9%sodium chloride solution intragastric administration for 6 weeks,and the lipid plaque deposition in aorta was observed by gross oil red O staining.Lipid deposition in aortic root was observed by oil red O staining.The pathological changes of lipid plaques in aortic root were observed by HE staining.The levels of interleukin-1β(IL-1β)and tumor necrosis factor α(TNF-α)in peripheral blood of mice were detected by enzyme-linked immunosorbent assay(ELISA).The expression of lymphocyte antigen 6G(Ly6G),myeloperoxidase(MPO)and citrulinated histone(Cit-H3)in plaques of the aortic arch and the colocalization of Ly6G,MPO and Cit-H3 were detected by immunofluorescence assay.Results Compared with the normal control group,the aorta of mice in the model control group showed serious lipid plaque deposition,morphological damage,and a large number of inflammatory cells infiltration,the contents of serum inflammatory factors IL-1β and TNF-α were increased,and the protein expressions of Ly6G,Cit-H3 and MPO were significantly increased.Compared with model control group,GZTLP group reduced the amount of lipid plaque deposition in aorta,the arrangement of aortic cells was more regular,the inflammatory cell infiltration was improved,and the contents of serum inflammatory factors IL-1β and TNF-α were significantly decreased(P<0.05).The colocalization and the protein expression of Ly6G,MPO and Cit-H3 were significantly decreased in aortic tissues(P<0.01).Conclusions GZTLP can improve atherosclerosis,and its mechanism may be related to the inhibition of neutrophil extracellular trapping nets.
4.Correlation between 1, 5-anhydroglucitol and mild cognitive impairment in elderly patients with type 2 diabetes mellitus
Lina WANG ; Xinju JIA ; Yuqing GUO ; Yan KANG ; Fan LIU ; Xiaojing LYU ; Huimin ZHOU
Chinese Journal of Behavioral Medicine and Brain Science 2024;33(7):618-623
Objective:To explore the correlation between serum 1, 5-anhydroglucitol (1, 5-AG) and mild cognitive impairment (MCI) in elderly patients with type 2 diabetes mellitus (T2DM).Methods:A total of 160 patients with T2DM aged 60-75 years old who visited the First Hospital of Hebei Medical University from May 2021 to July 2022 were selected. According to the Montreal cognitive assessment (MoCA), all patients were divided into T2DM with MCI group (T2DM+ MCI group, n=81) and T2DM without MCI group (T2DM group, n=79). All research subjects were tested for glycated hemoglobin A1c (HbA1c), serum 1, 5-AG, serum β-amyloid peptide 42 (Aβ42), and blood biochemical indicators.SPSS 25.0 statistical software was used for data analysis. The t test, Mann-Whitney U test and χ2 test were used to compare the two groups. Binary Logistic regression analysis was used to examine the relevant influencing factors. Results:(1) Compared with T2DM group, patients in T2DM+ MCI group had significantly higher age, systolic pressure and HbA1c(all P<0.05).The level of 1, 5-AG in T2DM+ MCI group was significantly lower than that in T2DM group( (15.65±2.56 )μg/mL, (18.17±3.72 )μg/mL, P<0.01), and the level of Aβ42 was higher than that of T2DM group (2.95 (3.36) pg/mL, 1.91 (2.48) pg/mL, P<0.05). (2) Binary Logistic regression analysis results showed that HbA1c( β=0.230, OR=1.259, 95% CI=1.010-1.568, P=0.040) and Aβ42( β=0.188, OR=1.206, 95% CI=1.033-1.409, P=0.018) were the independent risk factors for MCI in elderly patients with T2DM, while 1, 5-AG ( β=-0.240, OR=0.786, 95% CI=0.698-0.886, P<0.001) was the protective factor for MCI. Conclusion:There is a positive correlation between serum 1, 5-AG and cognitive function, and the decrease of 1, 5-AG level was associated with the increased risk of MCI in elderly patients with T2DM.
5.Incidence and risk factors of pulmonary hypertension in Chinese people living with human immunodeficiency virus
Ling LUO ; Xiaojing SONG ; Wei LYU ; Zhengyin LIU ; Huanling WANG ; Yanling LI ; Xiaoxia LI ; Wei CAO ; Taisheng LI
Chinese Journal of Infectious Diseases 2024;42(3):141-146
Objective:To evaluate pulmonary hypertension (PH) in Chinese people living with human immunodeficiency virus (HIV) receiving long-term anti-retroviral therapy (ART) and those who had not received ART for HIV infection, and to analyze the risk factors for PH in HIV infected individuals, so as to provide evidence for the monitoring and management of cardiovascular diseases in people living with HIV in China.Methods:HIV infected individuals who received long-term ART were from the NCT04463810 study cohort. In addition, using propensity score matching method, gender matched HIV infected individuals who had not received ART were selected as controls from the NCT00872417 and NCT01844297 studies. This study was a retrospective and observational clinical study. Basic data, clinical visit and cardiac Doppler ultrasonography data were collected to analyze the prevalence of PH and risk factors for PH in people living with HIV. Chi-square test and multivariate logistic regression were used for statistical analysis.Results:Among the 318 HIV infected individuals, 159 underwent long-term ART and 159 did not receive ART, which were divided into long-term ART group and ART-na?ve group, respectively. Among 318 HIV infected individuals, 30 cases (9.4%) experienced PH, including 23 cases (7.2%) with critical PH, six cases (1.9%) with mild PH, one case (0.3%) with moderate PH, and there was no severe PH. The prevalence of PH in the long-term ART group was 5.0%(8/159), which was lower than that in the ART-na?ve group (13.8%, 22/159). The difference was statistically significant ( χ2=7.21, P=0.012). Multivariate analysis showed that older age (odds ratio ( OR)=1.064, 95% confidence interval ( CI) 1.019 to 1.111, P=0.016) and unsuppressed HIV status ( OR=2.660, 95% CI 1.041 to 6.797, P=0.041) were independent risk factors for PH of people living with HIV. Conclusions:The prevalence of PH in people living with HIV with long-term ART is lower than that of ART-na?ve people living with HIV. Older age and unsuppressed HIV status are independent risk factors for PH in people living with HIV. Cardiac Doppler ultrasonography is helpful for the early screening of PH in people living with HIV. ART should be actively performed to reduce the incidence of PH in people living with HIV.
6.A Mendelian randomization study on the relationship between insomnia and osteoporosis
Hongzhou LIU ; Xiaomin FU ; Xiaojing LI ; Yuhan WANG ; Xiaodong HU ; Huaijin XU ; Anning WANG ; Zhaohui LYU ; Song DONG ; Yu PEI
Chinese Journal of Internal Medicine 2024;63(8):776-780
Objective:To explore the relationship between insomnia and osteoporosis.Methods:Mendelian randomization (MR) analysis were used in this study. The single nucleotide polymorphisms (SNPs) related to insomnia from genome-wide association analysis research data were selected as the instrumental variables by using inverse variance weighted (IVW), MR-Egger regression, weighted median method, maximum likelihood, penalized weighted median estimator, and Mendelian randomization robust adjusted profile score (MR-RAPS) to determine the causal relationship between insomnia and osteoporosis. Odds ratio ( OR) and 95% confidence interval ( CI) values were used to evaluate the association between insomnia and osteoporosis. Cochran′s Q-test was used to detect heterogeneity of SNPs, MR-Egger regression was used to test for level pleiotropy, and the leave-one-out method was used to test sensitivity, MR pleiotropy residual sum and outlier (MR-PRESSO) method and radial MR were used to detect erroneous outliers. Results:The screening criteria were set based on the three major assumptions of MR; finally, 31 SNPs were included in the MR analysis. The results of MR causal effect analysis using the IVW method showed that insomnia increased the risk of osteoporosis by about 0.7% ( OR=1.007, 95% CI 1.001-1.014, P=0.044); heterogeneity testing showed heterogeneity between SNPs ( Q=57.91, P<0.001); and the MR- Egger intercept test did not indicate horizontal pleiotropy in this study (intercept value=3.807×10 -5, P=0.888). Leave-one-out method showed that no single SNP had a significant impact on the overall results. No abnormal SNP was detected according to the MR-PRESSO results ( P=0.059), and radial MR did not detect any outliers. Conclusion:Mendelian randomization analysis showed that insomnia can increase the risk of osteoporosis.
7.Alcohol Extract of Angelicae Pubescentis Radix Treats Gouty Arthritis Induced by MSU via NLRP3/ASC/Caspase-1 Signaling Pathway
Xiaojing HEI ; Yaozhong LYU ; Liang LI ; Chenfeng ZHANG ; Wei XIAO
Chinese Journal of Experimental Traditional Medical Formulae 2023;29(13):79-87
ObjectiveTo explore the efficacy and mechanism of the alcohol extract DH50 of Angelicae Pubescentis Radix in treating gouty arthritis induced by monosodium urate (MSU) crystals in vivo and in vitro. MethodFifty male SD rats were randomly assigned into five groups (n=10): a normal group, a model group, a dexamethasone (DXMS, 0.07 mg·kg-1) group, and low- (DH50-D, 9 mg·kg-1) and high-dose (DH50-G, 18 mg·kg-1) DH50 groups. The rats in the normal group and model group were administrated with the same amount of pure water. On day 5, the gouty arthritis model was established by injecting MSU into the right ankle joint of rats. The toe volume and joint inflammation index were measured 4, 8, 24, and 48 h after modeling. The pathological changes of the synovial tissue were detected by hematoxylin-eosin (HE) staining. Enzyme-linked immunosorbent assay (ELISA) was employed to measure the levels of tumor necrosis factor-alpha (TNF-α), interleukin (IL)-1β, and IL-6 in the synovial tissue. Western blot was employed to measure the protein levels of NOD-like receptor protein 3 (NLRP3), cysteine-aspartic protease-1 (Caspase-1), apoptosis-associated speck-like protein containing a C-terminal caspase recruitment domain (ASC), IL-1β, and cyclooxygenase-2 (COX-2) in the synovial tissue. Furthermore, the cell inflammation model was established with RAW264.7 cells stimulated with MSU (75 mg·L-1). The cell experiments were carried out with 6 groups: a normal group, a model group, a positive drug (DXMS, 100 μmol·L-1) group, and low- (DH50-D, 25 mg·L-1), medium- (DH50-Z, 50 mg·L-1), and high-dose (DH50-G, 100 mg·L-1) DH50 groups. Methyl thiazolyl tetrazolium (MTT) assay was employed to determine the cell viability, ELISA to determine the content of TNF-α in the supernatant of cell culture, and Western blot to determine the protein levels of NLRP3, cleaved Caspase-1, IL-1β, TNF-α, and COX-2. ResultCompared with the normal group, the rat model group showed increased toe swelling degree and joint inflammatory index (P<0.01), serious infiltration of the synovium, elevated levels of inflammatory cytokines in the tissue homogenate (P<0.01), and up-regulated protein levels of NLRP3, Caspase-1, ASC, IL-1β, and COX-2 (P<0.05, P<0.01). Compared with the rat model group, low- and high-dose DH50 mitigated the toe swelling degree, decreased the joint inflammatory index, alleviated the inflammatory infiltration, lowered the levels of inflammatory cytokines in the tissue homogenate (P<0.01), and down-regulated the expression of related proteins (P<0.05, P<0.01). Compared with the normal group, the cell model group showed elevated level of TNF-α in the supernatant (P<0.01) and up-regulated protein levels of NLRP3, cleaved Caspase-1, IL-1β, TNF-α, and COX-2 (P<0.05). Compared with the model group, low, medium, and high doses of DH50 lowered the level of TNF-α in the supernatant of cell culture in a dose-dependent manner and down-regulated the expression of related proteins (P<0.05, P<0.01). ConclusionDH50 can mitigate gouty arthritis both in vitro and in vivo by inhibiting the activation of NLRP3 inflammasomes and the production of inflammatory cytokines.
8.Effect of long-term combination anti-retroviral therapy on cardiovascular disease risks in human immunodeficiency virus/acquired immunodeficiency syndrome patients
Xiaodi LI ; Wei CAO ; Zhengyin LIU ; Xiaojing SONG ; Yanling LI ; Xiaoxia LI ; Yun HE ; Yong XIONG ; Hanhui YE ; Huiqin LI ; Huanling WANG ; Wei LYU ; Ling LUO ; Taisheng LI
Chinese Journal of Infectious Diseases 2022;40(8):496-504
Objective:To explore the risks of cardiovascular disease (CVD) and influencing factors in human immunodeficiency virus/acquired immunodeficiency syndrome (HIV/AIDS) patients with long-term combination anti-retroviral therapy (cART).Methods:The baseline data from the multi-center prospective cohort of HIV/AIDS patients who received long-term cART from 2018 to 2020 were collected. cART-naive HIV/AIDS patients were matched by age and gender using the propensity score matching (PSM) as controls. Data collection adverse events of anti-human immunodeficiency virus drugs reduced model (D: A: D[R]) score, Framingham risk score (FRS) and atherosclerotic cardiovascular disease (ASCVD) risk score were used to assess the 10-year CVD risk in patients with long-term cART treatment and in cART-naive patients. Logistic regression analysis was used to assess the risk factors related to high 10-year CVD risk.Results:A total of 301 HIV/AIDS patients received long-term cART and 300 cART-naive HIV/AIDS patients were included, with an average age of 39.8 years old. There were 490 male accounting for 81.5%. Based on the D: A: D [R] score, 4.3%(13/301) of patients in the long-term cART group had a 10-year CVD risk assessment of ≥10%, and 6.3%(19/300) of patients in the cART-naive group. Based on the FRS, 13.4%(36/269) of patients in the long-term cART group had a 10-year CVD risk assessment of ≥10%, and 10.6%(28/264) in the cART-naive group. Based on the ASCVD risk score, 10.4%(14/135) of patients in the long-term cART group had a 10-year CVD risk assessment of ≥7.5%, and 13.8%(17/123) in the cART-naive group. There was no significant difference in the prevalence of high 10-years CVD risk between the long-term cART group and the cART-naive group assessed by any of risk equations (all P>0.050). By multivariate logistic regression analysis, the risk factors associated with 10-year CVD risk ≥10% assessed by D: A: D[R] model were age≥50 years, smoking, hypertension, diabetes, dyslipidemia and CD4 + T lymphocyte count <200×10 6 cells/L (adjusted odds ratio ( AOR)=697.48, 4 622.28, 23.11, 25.95, 27.72 and 18.25, respectively, all P<0.010). The risk factors associated with 10-year CVD risk ≥10% assessed by FRS were age≥50 years, male, smoking, hypertension, diabetes and dyslipidemia ( AOR=53.51, 4.52, 36.93, 36.77, 6.15 and 3.84, respectively, all P<0.050). The risk factors associated with 10-year CVD risk ≥7.5% assessed by ASCVD risk score were age≥50 years, male, smoking, hypertension, diabetes ( AOR=18.48, 14.11, 14.81, 13.42 and 12.41, respectively, all P<0.050). Conclusions:Long-term cART has no significant effect on the 10-year CVD risk in HIV/AIDS patients. Higher CVD risk in HIV/AIDS patients are mainly associated with CD4 + T lymphocyte counts<200×10 6 cells/L and traditional CVD risk factors, including age≥50 years old, smoking, hypertension, diabetes and dyslipidemia.
9.Evaluation the application of intra-operative cell salvage in cesarean section based on multicenter data
Bin LYU ; Xinghui LIU ; Yangyu ZHAO ; Meng CHEN ; Daijuan CHEN ; Xiaojing HU ; Xirong XIAO ; Jing HUANG ; Shaoshuai WANG ; Qianhua WANG ; Shuxiang LIU ; Quanfeng WU ; Yanyu HONG ; Lei ZHAO ; Shanshan ZHAI
Chinese Journal of Obstetrics and Gynecology 2021;56(8):537-544
Objective:To investigate the safety, efficacy and application indication of intra-operative cell salvage (IOCS) in cesarean section.Methods:A total of 1 265 pregnant women who received IOCS blood transfusion during cesarean section in 11 tertiary A hospitals from August 2016 to January 2019 were collected and divided into <1 500 ml group (796 cases) and ≥1 500 ml group (469 cases) according to the amount of blood loss during cesarean section. The general clinical data, ultrasonic imaging data, perinatal and puerperium indicators were analyzed retrospectively. The risk factors of intraoperative blood loss ≥1 500 mL using IOCS transfusion were analyzed by logistic multivariate regression.Results:(1) A total of 848 001 ml of blood was recovered and a total of 418 649 ml of blood was transfused in 1 265 pregnant women who received IOCS transfusions, which was equivalent to 23 258 U red blood cell suspension, greatly saving medical resources. The intraoperative blood loss in <1 500 ml group and ≥1 500 ml group was 800 ml (300-1 453 ml) and 2 335 ml (1 500-20 000 ml), respectively. No amniotic fluid embolism, severe adverse reactions, shock and death occurred in the two groups. (3) Multivariate regression analysis showed that age ≥35 years ( OR=1.5, 95% CI: 1.1-1.9), prenatal hemoglobin level <110 g/L ( OR=1.7, 95% CI: 1.3-2.2), history of uterine surgery ( OR=1.8, 95% CI: 1.3-2.6), placenta previa ( OR=1.9, 95% CI: 1.1-3.1), placenta accreta ( OR=2.6, 95% CI: 1.8-3.9), blood pool in the placenta ( OR=1.6, 95% CI: 1.1-2.3), abnormal posterior placenta muscle wall ( OR=1.8, 95% CI: 1.2-2.6), placenta projecting to the anterior uterine wall ( OR=3.0, 95% CI: 1.3-7.0) were risk factors for blood loss ≥1 500 ml in obstetric transfusion using IOCS technique, with statistical significance (all P<0.05). Conclusion:IOCS is safe and effective in cesarean section, which could save the medical resources and reduces medical expenses, however, it is necessary to strictly master the application indication.
10.Incidence of unintended pregnancy within 2 years after delivery and its influencing factors in China
Caixia YANG ; Xuhong ZHAO ; Yuyan LI ; Yanfei ZHOU ; Lin'ai ZHANG ; Dong YUAN ; Wei XIA ; Jianmei WANG ; Jiandong SONG ; Wen LYU ; Yongfeng LUO ; Lifang JIANG ; Li JIANG ; Xiaochen HUANG ; Xiaoyu HU ; Xiaojing DONG ; Tongyin CHENG ; Yuanzhong ZHOU ; Yan ZHANG ; Yan CHE
Chinese Journal of Obstetrics and Gynecology 2021;56(9):616-621
Objective:To investigate the present situation of unintended pregnancy within two years postpartum and its influencing factors in China.Methods:Participants who delivered a live birth at 60 hospitals in 15 provinces in the eastern, central and western regions of China during July 2015 to June 2016 were interviewed by using structured questionnaire. Information on occurrence of unintended pregnancy within 2 years after delivery, postpartum contraceptive use, sexual resumption, breastfeeding, and women′s socio-demographic characteristics, and so on, were collected. Life-table analysis, cluster log-rank tests and a 2-level Cox regression model were used for data analysis.Results:A total of 18 045 postpartum women were investigated. The cumulative 1- and 2-year unintended pregnancy rates after delivery were 5.3% (95% CI: 4.5%-6.1%) and 13.1% (95% CI: 11.3%-14.8%), respectively. Cox regression model analysis showed that the risk of unintended pregnancy within 2 years postpartum were increased in younger women, ethnic minorities, women with abortion history, and those who had a vaginal delivery with short lactation time and late postpartum contraceptive initiation (all P<0.01). The risk of postpartum unintended pregnancy was not associated with geographic regions and hospitals where women gave a birth (all P>0.05). Conclusions:In China, the risk of unintended pregnancy within 2 years after delivery is relatively high. Service institutions and service providers should improve the quality of postpartum family planning services, promote the use of high effect contraceptive methods, and educate women to use a method at the time of their sexual resumption or even before.

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