The purpose of this study was to investigate the effect of feeding patterns during the first 6 months on weight development of infants ages 0-12 months. Using monitoring data from the Maternal and Child Health Project conducted by the National Center for Women and Children's Health of the Chinese Center for Disease Control and Prevention from September 2015 to June 2019, we categorized feeding patterns during the first 6 months as exclusive breastfeeding, formula feeding, or mixed feeding. We calculated weight-for-age Z scores (WAZ) according to the World Health Organization's (WHO) 2006 Child Growth Standard using WHO Anthro version 3.2.2. A multilevel model was used to analyze the effect of feeding patterns during the first 6 months on the WAZ of infants ages 0-12 months in monitoring regions. Length of follow-up (age of infants) was assigned to level 1, and infants was assigned to level 2. Characteristics of infants, mothers, and families and region of the country were adjusted for in the model. The average weight of infants ages 0-12 months in our study (except the birth weights of boys who were formula fed or mixed fed) was greater than the WHO growth standard. After we adjusted for confounding factors, the multilevel model showed that the WAZ of exclusively breastfed and mixed-fed infants were statistically significantly higher than those of formula-fed infants (coefficients = 0.329 and 0.159, respectively; P < 0.05), and there was a negative interaction between feeding patterns and age (both coefficients = - 0.020; P < 0.05). Infants who were exclusively breastfed were heavier than formula-fed infants from birth until 12 months of age. Mixed-fed infants were heavier than formula-fed infants before 8 months, after which the latter overtook the former. Infants' weight development may be influenced by feeding patterns during the first 6 months. Exclusive breastfeeding during the first 6 months may be beneficial for weight development of infants in infancy.

目的 验证中国幼儿睡眠状况评估量表(TSAS)的信度和效度,建立全国常模和界值.方法 2021年5-12月采用多阶段随机抽样,选取我国7省(直辖市)14市城乡地区的2 816例12～35个月幼儿的看护人进行调查.采用内部一致性信度、分半信度和验证性因子分析对量表的信度效度进行验证,制定百分位常模(P5、P15、P50、P85和P95),分别以超过P85、P97作为量表总分判断睡眠不良、睡眠异常的界值.结果 TSAS的Cronbach's α系数为0.73,分半信度为0.81,因子结构模型稳定,具有较好的信度和效度.建立了量表总分的年龄百分位常模.量表总分大于40分为睡眠不良,大于45分为睡眠异常.结论 TSAS具有稳定的信度和效度,构建的全国性常模和界值为量表的推广和应用提供客观依据.

Objective This study aimed to evaluate the effects of a mindfulness-based psychosomatic intervention on depression, anxiety, fear of childbirth (FOC), and life satisfaction of pregnant women in China.Methods Women experiencing first-time pregnancy (n = 104) were randomly allocated to the intervention group or a parallel active control group. We collected data at baseline (T0), post-intervention (T1), 3 days after delivery (T2), and 42 days after delivery (T3). The participants completed questionnaires for the assessment of the levels of depression, anxiety, FOC, life satisfaction, and mindfulness. Differences between the two groups and changes within the same group were analyzed at four time points using repeated-measures analysis of variance. Results Compared with the active control group, the intervention group reported lower depression levels at T2 (P = 0.038) and T3 (P = 0.013); reduced anxiety at T1 (P = 0.001) and T2 (P = 0.003); reduced FOC at T1 (P < 0.001) and T2 (P = 0.04); increased life satisfaction at T1 (P < 0.001) and T3 (P = 0.015);and increased mindfulness at T1 (P = 0.01) and T2 (P = 0.006). Conclusion The mindfulness-based psychosomatic intervention effectively increased life satisfaction and reduced perinatal depression, anxiety, and FOC.

Background Lupus mesenteric vasculitis (LMV) as initial presentation is rare, especially in childhood-onset systemic lupus erythematosus (cSLE). It is a critical complication of lupus. At present, the research on cSLE with LMV as the initial presentation is few. The aim of this study was to analyze the clinical characteristics and prognosis of cSLE with LMV in the Chinese population, compared with non-LMV cSLE. Methods A retrospective case-controlled study was conducted on 55 cSLE patients between July 2018 and July 2021. The clinical data, laboratory findings, imaging, treatment, and follow-up data were collected and compared between the two groups of cSLE with LMV and non-LMV. Non-LMV cSLE patients were matched according to the age and sex of LMV patients. Results A total of 11 cSLE patients with LMV as the LMV group and 44 cSLE patients without LMV as the non-LMV group were included. The average age of onset was 12.55 ± 1.57 years old, the male-to-female ratio was 2:9, and high disease activity was observed in the LMV group. Abdominal pain was most common in LMV. Compared with the non-LMV, the percentage of abdominal pain, vomiting, abdominal distension, and diarrhea was higher, and gastrointestinal tract, serous cavity, kidney, and lung damage were higher in the LMV group ( P < 0.05). In abdominal-enhanced CT, the percentage of intestinal wall thickening, peritoneal effusion, mesenteric vascular enhancement, hydronephrosis with ureteral dilatation, intestinal congestion, and gastric mucosa thickening in the LMV group were higher than those in the non-LMV group ( P < 0.05). The percentage of receiving methylprednisolone pulse combined with cyclophosphamide pulse therapy in LMV was higher than in non-LMV. The clinical symptoms disappeared quickly, and there were no deaths in the LMV group. Compared with the non-LMV group, the 24-h urinary protein was higher, the complement C3 was lower, and the disease activity was higher in the LMV group ( P < 0.05). Conclusions LMV often occurs in 12 ~ 13-year-old girls with high disease activity of cSLE. Abdominal pain is the most common and more susceptible to damage to the kidney, serous cavity, and lung in cSLE with LMV. Methylprednisolone pulse combined with CTX pulse therapy is effective. After the treatment above, cSLE with LMV has a good prognosis, but the overall recovery is worse than non-LMV patients.

What is already known about this topic?The prevalence of adverse pregnancy outcomes (APOs) exhibits a disparity between urban and rural areas, which is commonly associated with various factors, such as demographic and socio-environmental factors. However, the specific contribution of each factor has not yet been elucidated.What is added by this report?This study demonstrates that the primary factors contributing to urban-rural differences in the prevalence of APOs are population structure, parental age, parity, and regional development.What are the implications for public health practice?Future prevention and control measures should be directed toward considering population structure and regional differences. Accurate interventions will enhance the efficiency of public health services.

目的 分析我国部分地区"两癌"筛查工作实施现状,为筛查工作持续开展提供参考.方法 对"两癌"筛查相关管理人员和专业技术人员开展专题小组讨论,采用NVivo 12 Plus软件并运用主题框架法对收集内容进行编码和分析.结果 组织管理方面,部分地区筛查对象范围逐渐扩大到常住或流动人口,调查的6个县(区)均将"两癌"筛查纳入民生工程,建立分级质量控制体系;资源投入方面,调查的6个县(区)财政均能足额保障筛查经费,并实现信息化管理,但部分地区仍存在资金不足、人员能力较低以及设备不满足需求等问题.服务提供方面,部分地区已逐渐实现常态化管理,重视转诊救治工作,且受访者反映妇女筛查意愿相对提高,但从未筛查妇女仍是筛查难点.结论 政府重视、充足的资金投入是筛查工作持续开展的重要保障;筛查工作常态化、制度化、信息化是实现广筛查的重要手段.今后仍须加强经费保障;提高人员能力;完善信息系统建设;加强健康教育.

目的 分析我国6市城乡地区3岁以下婴幼儿睡眠时间及其年代发展趋势,为国内婴幼儿睡眠时间提供新的数据支持.方法 2019年7月至11月在我国6市随机选取1234名0～35月龄婴幼儿为研究对象,采用简明婴儿睡眠问卷对受试婴幼儿看护人进行现场调查,并进行数据的统计分析.结果 婴幼儿白天睡眠时间和24小时总睡眠时间随月龄增加逐渐减少(χ2值分别为479.03、388.84,P<0.01),从出生到3岁前平均分别减少了6.0小时和5.0小时,且在3个月内减少幅度最为明显;3岁前婴幼儿夜间睡眠时间平均为9.0～9.5小时,且不同月龄间差异无统计学意义(χ2=16.24,P=0.06).夜间睡眠时间占比随月龄增加逐渐增加(χ2=450.63,P<0.01),由0～1月龄的55.6％ 增至30～35月龄的81.8％.婴幼儿白天睡眠时间、夜间睡眠时间及24小时总睡眠时间的城乡间比较差异均无统计学意义(P>0.05).与2004年相比,3岁以下婴幼儿睡眠时间呈减少趋势,且夜间睡眠时间之间的差异有统计学意义(Z=-2.10,P=0.04).参照我国2017年发布的《0岁～5岁儿童睡眠卫生指南》,婴幼儿睡眠时间不足中,0～3月龄、4～11月龄及12～35月龄分别占14.4％、21.7％ 和13.8％.结论 婴幼儿期为其睡眠时间的快速发展阶段,其睡眠时间有长期减少的发展趋势.

Background This study aimed to investigate the efficacy of Happiness Pregnant Birth Parenting (HPBP) in preventing perinatal depression and reducing perceived anxiety and fear in Chinese pregnant women. Methods Women experiencing first-time pregnancy ( n = 104) were randomly allocated to the HPBP group or a parallel control treatment group; We collected data at baseline (T0), post-intervention (T1), three days after delivery (T2), and 42 days after delivery (T3). Participants completed questionnaires regarding depressive symptoms, perceived anxiety, fear, satisfaction with life, and five facets of mindfulness. We analyzed differences between the two groups and changes within the same group at the four time points using repeated-measures ANOVA. Results Compared to the active control treatment group, the HPBP group reported lower levels of perceived depressive symptoms at T2 ( p < .05, d = 1.83) and T3 ( p = .01, d = 2.21); significantly reduced anxiety at T1 ( p = .001, d = 5.31) and T2 ( p = .003, d = 6.12); significantly reduced fear at T1 ( p < .01, d = 14.95) and T2 ( p = .04, d = 10.95); and significantly increased life satisfaction at T1 ( p < .01, d = 3.86) and T3 ( p = .015, d = 3.1) and self-reported mindfulness at T1 ( p = .01, d = 6.81) and T2 ( p < .01, d = 8.7). Conclusions The findings indicate that the HPBP intervention based on mindfulness effectively decreases the risk of perinatal depression, anxiety, and fear. Thus, this research enhances our knowledge of effective intervention strategies to promote mental well-being and prevent perinatal depression or other negative mental states among pregnant women. Trial registration :Chinese Clinical Trial Registry (ChiCTR):ChiCTR2000033149; The date of first registration is 24/ 05/ 2020.

ObjectiveThis study aimed to examine the sleep arrangements and soothing methods and to assess their associations with sleep problems among children aged < 3 years in China.MethodsA cross-sectional survey was conducted in 2019 from six provinces in China. A total of 1,195 caregivers of children aged 0-35 months were included in the study. Data on sleep arrangements, soothing methods, and sleep problems (i.e., frequent night awakenings and difficulty falling asleep) were assessed using the Brief Infant Sleep Questionnaire. The reasons for bed-sharing in sleep arrangements were recorded using a self-designed questionnaire.ResultsThe bed-sharing practice was very prevalent at any age, which ranged from 69.9% to 78.3%. Most infants fell asleep while feeding or being rocked/held before age 12 months. By age 35 months, 62.4% of the children fell asleep in bed near parents. The most common reasons for bed-sharing were breastfeeding/feeding and convenience. Parental involvement when falling asleep was significantly related with frequent night awakenings and difficulty falling asleep. No association was found between bed-sharing and sleep.ConclusionBed-sharing and parental involvement were very common among Chinese children aged < 3 years. Children who fall asleep with parental involvement were more likely to have sleep problems.

目的 了解京津冀地区人类辅助生殖技术服务机构(以下简称"辅助生殖机构")配置现状和地理可及性,为国家下一轮配置规划提供参考依据.方法 首先运用地图慧软件了解京津冀地区的60家辅助生殖机构的地理位置,其次对辅助生殖机构分省、分技术类别进行描述性分析,最后利用百度地图计算采用驾驶机动车方式各县(县级市、区)到京津冀地区辅助生殖机构的最短距离和最短时间并用最小值、最大值、均数±标准差等进行描述性分析.结果 京津冀地区共有辅助生殖机构60家,其中北京共18家、天津共11家、河北共31家.京津冀地区各县到人类辅助生殖技术(assisted reproductive technology,ART)/夫精人工授精(artificial insemination-husband semen,AIH)、供精人工授精(artificial insemination-donor semen,AID)、体外受精(in vitro fertilization,IVF)/卵质内单精子注射(intracytoplasmic sperm injection,ICSI)、植入前胚胎遗传学诊断(preimplantation genetic diagnosis,PGD)机构最短距离的均数分别为44.6?km、151.2?km、75.5?km、210.9?km,其中最短距离小于90.0?km的县的比例分别为92.4％、24.2％、76.7％、19.7％;京津冀地区各县到ART/AIH、AID、IVF-ET/ICSI、PGD机构最短时间的均数分别为50.9 min、136.0 min、75.4 min、185.8 min,其中最短时间小于90.0?min的县的比例分别为91.9％、23.3％、76.2％、17.5％.结论 京津冀地区辅助生殖机构配置的总体地理可及性较好,但也应采取有效措施弥补河北少部分县地理可及性的不足,并结合患者需求逐步改善AID、PGD机构的地理可及性.

目的 了解婴幼儿看护人睡眠认知和养育行为的现状及其一致性.方法 采用多阶段随机抽样方法,于2019年7-11月在6市社区和乡镇对婴幼儿看护人进行问卷调查,共1213例问卷纳入分析,采用x2检验、Kappa系数分析睡眠认知和睡眠养育行为的特征及一致性.结果 在认知层面,看护人中76.8％认为应该让孩子独自入睡,60.9％认为与家人同屋单独小床最有利孩子睡眠,75.8％认为最佳夜醒处理方式是观察几分钟再处理.农村地区、家庭月收入≤5000元、大学/大专以下文化程度、(外)祖父母、1岁以下婴儿的看护人睡眠认知相对较差(P＜0.05).在实际养育时,让孩子独自入睡、与家人同屋单独小床睡眠和夜醒后观察几分钟再处理的比例分别为26.2％、22.2％和54.2％.看护人在入睡方式、睡床方式和夜醒处理方式上的认知和养育行为之间的Kappa系数分别为0.193、0.131和0.419.结论 多数看护人对婴幼儿睡眠有正确认知,但个体差异较大,且养育行为与认知之间一致性较差.

目的:了解我国部分农村地区妇女乳腺癌筛查工作现状及效果,探讨影响筛查效果的因素,为提高乳腺癌筛查水平提供参考.方法:采用问卷调查和网络直报系统收集2018年6省(自治区)乳腺癌筛查工作的组织管理、服务提供以及筛查效果数据,采用单因素x2检验和泊松回归分析乳腺癌筛查效果及其影响因素.结果:2018年6省154个县共有1156287例农村妇女接受乳腺癌筛查,早期乳腺癌检出率为24.39/10万,贫困县(17.51/10万)低于非贫困县(40.18/10万);乳腺癌检出率为47.91/10万,贫困县(37.62/10万)低于非贫困县(71.53/10万).多因素分析显示,非贫困县中,初筛地点以及筛查服务参与机构类型是其筛查效果的影响因素;在贫困县中,经费来源途径是其筛查效果的影响因素.结论:我国农村地区特别是贫困地区乳腺癌筛查效果仍不理想,应加大对经济欠发达地区政策倾斜和经费投入,因地制宜选择筛查参与机构,多措并举加强人员能力建设,不断提高筛查质量.

Abstract Background The number of HIV-positive pregnant women accounted for about 10% of China’s total over the past few years in Liangshan Prefecture, Sichuan province in China. Although cost-effectiveness of the PMTCT of HIV have been evaluated in other previous studies, no specific study has been conducted in Liangshan prefecture, nor has the expenses paid individually by HIV-positive pregnant women been included. The purpose of this study was to evaluate both the short-term and long-term cost-effectiveness of PMTCT of HIV in Liangshan Prefecture from the social perspective. Methods From December 2018 to January 2019, individual expenses and the other costs were collected: individual expenses of 133 recruited HIV-positive pregnant women registered in the National Information System of Prevention of Mother-to-Child Transmission of HIV, Syphilis, and HBV, and the other costs from local maternal and child healthcare hospitals, Centers for Disease Control and Prevention, and general hospitals. The costs, the number of pediatric infections averted from being HIV infected were analyzed. And, Life years gained by pediatric infections averted were calculated by using a life table. Besides, Direct benefit was calculated through a Markov mode. Furthermore, One-way sensitivity analysis was conducted for key variables affecting the benefit–cost ratio. Results The estimated number of pediatric infections averted was 164.The total cost was USD 114.1 million, including direct medical costs, direct non-medical costs, and indirect costs, which were USD 54.2 million, USD 53.4 million, and USD 6.5 million, respectively. 630.6 person-years discounted to 2017 were gained at a 3% annual rate, and cost per life year gained was USD 1809.50. Direct benefits were USD 198.4 million, indirect benefits USD 82.5 million, and the benefit–cost ratio was 1.5. The sensitivity analysis showed that if PMTCT costs hypothetically ranged from USD 85.6 million to USD 142.6 million, benefit–cost ratio would vary from 1.0 to 2.3. Conclusions PMTCT of HIV in Liangshan Prefecture was very cost-effective. It was a great economic burden of PMTCT on HIV-positive pregnant women and their families to take individual expenses. Therefore, it could be suggested that individual expenses should be covered as much as possible by different types of financing.

目的 了解并分析6月龄前不同喂养方式下监测地区0～24月龄婴幼儿各随访点的身长水平现状和差异.方法 基于我国5省监测区县儿童随访数据,分别描述6月龄前不同喂养方式下南、北方监测地区0～24月龄男、女童各随访点(出生、1、3、6、8、12、18、24月龄)的身长水平,并采用t检验或方差分析等统计方法对其进行分析.结果 各随访时间点男童的平均身长高于女童,北方监测地区儿童的平均身长高于南方监测地区,差异均有统计学意义(P<0.05).6月龄前不同喂养方式下北方监测地区男童8、12、18、24月龄身长的组间差异有统计学意义(F值分别为6.56、6.93、5.25、6.99,P<0.05),女童仅24月龄时身长水平存在统计学差异(F=4.39,P<0.05),其余随访月龄不同喂养方式间的身长差异均无统计学意义(P>0.05).南方监测地区男童、女童各随访点身长水平在不同喂养方式间的差异均无统计学意义(P>0.05).结论 6月龄前不同喂养方式下,南北方监测地区儿童的6月龄内身长水平无明显差异;6月龄后仅北方监测地区8～24月龄男童和24月龄女童呈现部分差异,关于6月龄前喂养方式对儿童6月龄之后身长的影响尚待进一步研究明确.

目的 验证中国婴儿睡眠状况评估量表(ISAS)的信度效度,建立全国常模、睡眠不良和睡眠异常的界值.方法 采用多阶段随机抽样,选取我国7省14市城乡地区的5 855例婴儿(其中0～3个月2 943例,4～11个月2 912例)看护人进行调查.采用内部一致性信度、分半信度和验证性因子分析对量表的信度效度进行验证,制定百分位常模,分别以超过P85、P95作为量表总分判断睡眠不良、睡眠异常的界值.结果 ISAS(0～3个月)和ISAS(4～11个月)Cronbach's a系数分别为0.68、0.69,分半信度为0.78、0.75,因子结构模型稳定,具有较好的信度和效度.建立了 ISAS(0～3个月)的年龄常模以及ISAS(4～11个月)分性别的年龄常模.两个量表总分的睡眠不良界值分别是31、32,睡眠异常界值分别是34、35.结论 两个量表具有稳定的信度和效度,构建的常模和界值可用于量化评估婴儿睡眠状况,为ISAS的推广和应用提供量化依据.

BACKGROUND:Liangshan prefecture of Sichuan province was an impoverished mountainous area in China, where the annual number of HIV-positive pregnant women accounted for approximately 10% of China's total population in the decades before 2020. In general, pregnant women living here are likely to be physically and mentally different from those in other places. OBJECTIVE:This study aims to explore the health-related quality of life (HRQoL) of pregnant women living with HIV in an impoverished area. METHODS:From December 2018 to January 2019, HIV-positive and HIV-negative parturients within 18 months after delivery were recruited in Liangshan Prefecture, Sichuan Province. Questionnaires were designed to collect their demographic data, while the EuroQol 5-Dimension, 3-Level questionnaire was used to measure their HRQoL when they were in the second trimester from 4 to 6 months of pregnancy, and their quantitative health scores were converted to corresponding healthy utility values by using the Chinese Utility Value Integral System (time trade-off coefficient). RESULTS:A total of 250 pregnant women (133 HIV-positive and 117 HIV-negative) were enrolled in the study. Among them, 55 (41.35%) and 75 (64.10%) of HIV-positive and HIV-negative pregnant women self-reported full health (healthy state 11111), respectively. The median health utility value of the 250 pregnant women was 0.961 (IQR -0.046 to 0.961), and those of the HIV-positive and HIV-negative pregnant women were 0.875 (0.424-0.961) and 0.961 (IQR -0.046 to 0.961), respectively. We observed a significant difference only in the dimension of anxiety or depression between the two groups (P=.002) and no significant difference in the distribution of health utility indices between the two groups in terms of maternal age, education level, occupation, annual household income, prenatal care visits, family size, and medical insurance category. Multivariate ordinal logistic regression analysis showed that age (odds ratio [OR] 0.62, P<.05) and prenatal care visit (OR 0.29, P<.01) were independent risk factors for health status. CONCLUSIONS:Most pregnant women self-reported satisfactory HRQoL in this impoverished mountainous area. HIV-negative pregnant women had an edge over HIV-positive pregnant women, and there were significant differences in anxiety or depression dimensions between the two groups.

目的 分析HIV阳性产妇接受预防艾滋病母婴传播服务支付意愿.方法 于2018年12月至2019年1月,从凉山州招募HIV阳性产妇,通过问卷调查个人基本信息、家庭基本信息及支付意愿等,进一步分析支付意愿及影响因素.结果 133名研究对象均为彝族,平均年龄(32.37±5.62)岁、文盲114人(85.71％)、农民118人(88.72％)、家庭平均人口 5(3,9)人、家庭平均年收入7 000(4 000,12 500)元,"无限支付"有85人(63.91％)、"有限支付"有22人(16.54％)和"零支付"有26人(19.55％),有限支付意愿产妇的平均支付意愿是4 250(3 000,5 000)元.单因素分析显示不同家庭人口数和职业类型间的支付意愿差异存在统计学意义,Fisher精确检验的P值分别为0.033、0.034.有序多分类Logistic回归多元影响因素分析发现,年龄对支付意愿的影响有统计学意义(P=0.028),高年龄产妇的支付意愿低(OR=0.45,95％CI:0.22～0.92).结论 凉山州HIV阳性产妇家庭收入较低,年龄是影响支付意愿的因素.

目的 了解孕产妇新型冠状病毒肺炎(简称新冠肺炎)相关知识知晓及行为状况,为进一步开展孕产妇健康教育和促进工作提供依据.方法 自行设计调查问卷,采取方便抽样的方法,于2020年2月27日至3月6日利用母子健康App对1 014名孕产妇用户进行网络问卷调查,对孕产妇新冠肺炎防护知识知晓情况以及知识获取途径等进行分析.结果 孕产妇新冠肺炎预防相关知识总知晓率为87.7％,94.8％的孕产妇认为新冠肺炎会人传人,95.3％的孕产妇认为预防新冠病毒感染应经常开窗通风,部分孕产妇认为盐水漱口液(24.8％)、吃大蒜(15.8％)是预防新冠肺炎的有效措施.初产妇新冠肺炎防护知识知晓率为89.9％,高于经产妇(83.8％),差异有统计学意义(x2=47.971,P＜0.05).孕产妇主要通过医务人员宣传(59.1％)、网络及社交平台(47.0％)、广播电视(39.1％)等方式获取新冠肺炎预防相关知识,同时通过3种及以上途径获取相关预防知识的有36.0％.孕产妇主要采取的预防措施有外出时戴口罩(92.8％)、经常洗手(88.8％)、绝大多数时间居家(88.0％),初产妇同时采取这3种措施的比例高于经产妇,差异有统计学意义(x2=6.283,P=0.012).结论 孕产妇具备较好的新冠肺炎预防知识和防护能力,但仍存在一些误区,需要多途径开展宣传,尤其要充分发挥医务人员的作用,并加大对经产妇的宣传和管理力度.

What is already known about this topic? Several studies have reported that maternal antenatal intention to breastfeed is a strong predictor of actual breastfeeding duration. However, little research has investigated whether maternal postpartum intention also extends breastfeeding duration. What is added by this report? Maternal postpartum intention to breastfeed was a protective factor for extending actual breastfeeding duration after controlling potential confounders. What are the implications for public health practice? It is crucial to address and promote intrinsic and extrinsic factors that influence a mother’s intention to breastfeed after delivery, thereby extending the actual breastfeeding duration.

目的 探讨6月龄前不同喂养方式对监测地区0～12月龄婴儿身长的影响.方法 采用2015年9月至2019年6月中国疾病预防控制中心妇幼保健中心开展的母婴健康动态追踪监测项目随访数据,该项目选取了南、北方地区共5个监测区县(河北省石家庄市正定县,辽宁省鞍山市立山区,福建省厦门市海沧区、集美区,湖南省岳阳市岳阳县),所监测区县符合条件的孕晚期孕妇及所生儿童作为监测对象,并追踪随访观察至儿童满3周岁,系统、动态收集孕妇及各阶段儿童体格健康信息以及养育情况和喂养情况等信息.本研究纳入上述项目中0～12月龄婴儿,将6月龄前婴儿喂养方式分为纯母乳喂养、人工喂养、混合喂养,并构建时间-婴儿两水平生长模型,调整婴儿特征(包括性别、辅食添加时间、出生身长),母亲及家庭特征(包括母亲身高、母亲文化程度、父亲身高、家庭年收入、监测地区),分析6月龄前不同喂养方式对监测地区0～12月龄婴儿身长的影响.结果 婴儿身长测量值显示,出生、1、3、6月龄不同喂养方式婴儿身长水平相近(P>0.05),8、12月龄人工喂养组婴儿身长则高于混合喂养组和纯母乳喂养组婴儿(P<0.05).模型分析结果显示,调整婴儿、母亲及家庭特征后,6月龄前不同喂养方式对0～12月龄婴儿身长的整体影响,差异具有统计学意义,且与时间存在交互作用(P<0.05).纯母乳喂养和混合喂养婴儿6个月前平均身长均高于人工喂养婴儿,之后随着婴儿月龄的增长,纯母乳喂养婴儿和混合喂养婴儿平均身长逐渐低于人工喂养婴儿,人工喂养婴儿平均身长分别于7、10月龄高于混合喂养和纯母乳喂养婴儿.结论 6月龄前不同喂养方式下0～12月龄婴儿身长生长模式不同,在婴儿生长早期,6月龄前坚持纯母乳喂养婴儿身长更长;而在婴儿生长后期(10～12月龄),6月龄前人工喂养婴儿身长更长.