Final data for in Stata.dta

Antenatal care (ANC) is the care given to pregnant by qualified medical experts in order to guarantee the optimal health conditions for the mother and the unborn child during pregnancy. Four or fewer antenatal care (ANC) visits are strongly linked to maternal and perinatal death. Because of this, the World Health Organization created a new model known as minimum of eight antenatal care (ANC8+) contact. This study aims to focus on the current antenatal care contact which not previously addressed. Therefore, the aim of this to investigate time to first antenatal care contact and its predictors among pregnant women at Bishoftu General Hospital 2023/24Methods: An institutional-based cross-sectional study design was conducted among 347 study participants which was selected by systematic random sampling method. The data was collected using pretested, structured questionnaires. Data was entered into Epi Data version 4.6 and analyzed using STATA 15. Descriptive summary statistics like median survival time, Kaplan Meier survival curve, and Log-rank test were computed. Bivariate and multivariable Weibull regresion models were fitted to identify the time to first antenatal care contact and predictors. A hazard ratio with a 95% confidence interval was calculated and p-values &lt; 0.05 were considered statistically significantEthical approval and informed consentEthical clearance was obtained from an institutional Research Ethics Review Board (IRB) of the University of Arsi University (with Reference number, A/CHS/18/2023). In addition, a letter of ethical approval was sent to Bishoftu General Hospital to be obtained from the hospital’s administrators. Informed, voluntary, and verbal were obtained from the head of the hospital and mothers. There are no study participants under the age of 18 years. Before conducting the interviews, information was given to the participants, and were assured of voluntary participation, confidentiality, and freedom to withdraw from the study at any time. The nature and significance of the study were explained to the participantsData collection tool and proceduresTo ensure the quality of data at the beginning, a data collection questionnaire was pre-tested on 5% of the calculated sample size at Chelelaka Health Center and necessary modifications will be made based on gaps identified in the questionnaire. Any error found during the process of checking will be corrected and modifications will be made to the final version of the data abstraction format. Training will be given to data collectors and supervisors for 01 days before the actual data collection task on the already existing records, half-day theoretical and half-day practical training. Data quality will be controlled by designing the proper data collection materials, through continuous supervision. All completed data collection forms will be examined for completeness and consistency during data management, storage, cleaning, and analysis. The data will be entered and cleaned by the principal investigator before analysis. Midwives, who are working in the maternity ward, will collect the data. The principal investigator of the study will control the overall activity.<br>

产前保健（Antenatal Care, ANC）指由合格医疗人员为孕妇提供的照护服务，旨在保障妊娠期产妇与未出生胎儿的最佳健康状态。四次及以下的产前保健就诊次数与孕产妇及围产儿死亡密切相关。为此，世界卫生组织（World Health Organization）提出了最低8次产前保健接触的全新模式（简称ANC8+）。本研究聚焦此前未被充分探讨的当前产前保健接触现状，旨在调查比绍夫图综合医院（Bishoftu General Hospital）2023/24年度孕妇首次产前保健接触的时间及其影响因素。

方法：本研究采用基于机构的横断面研究设计，通过系统随机抽样法选取347名研究对象。数据通过预先经过信效度检验的结构化问卷收集，录入Epi Data 4.6版本后，使用STATA 15进行统计分析。本研究计算了中位生存时间、卡普兰-迈耶（Kaplan-Meier）生存曲线及Log-rank检验等描述性汇总统计量；构建双变量及多变量威布尔（Weibull）回归模型，以识别首次产前保健接触时间的影响因素。最终计算获得95%置信区间的风险比，以p值<0.05作为统计学显著性的判定标准。

伦理批准与知情同意：本研究已获得阿尔西大学（University of Arsi University）机构伦理审查委员会（Institutional Research Ethics Review Board, IRB）的伦理许可，批准编号为A/CHS/18/2023。此外，研究团队已向比绍夫图综合医院提交伦理批准申请，并获得医院管理层的许可。本研究从医院负责人及孕妇处获取了知情、自愿的口头同意，且未纳入18岁以下的研究对象。在开展访谈前，研究人员已向所有参与者告知研究相关信息，明确告知其可自愿参与、信息将被严格保密，且可随时退出研究，并向参与者解释了本研究的性质与研究意义。

数据收集工具与流程：为保障初始数据质量，研究团队在Chelelaka健康中心对计算样本量的5%进行了预测试，并根据问卷中发现的缺陷进行必要修改；核查过程中发现的所有错误均将被纠正，并对最终版数据提取格式进行调整。在正式基于现有记录开展数据收集工作前，将对数据收集员与督导员开展为期1天的培训，包含半天理论教学与半天实操演练。数据质量将通过设计合理的数据收集材料，并通过持续督导进行管控。在数据管理、存储、清洗与分析阶段，将对所有完成的数据收集表格进行完整性与一致性核查。分析前，本研究的主要研究者将完成全部数据的录入与清洗工作。产科病房的在职助产士将负责数据收集工作，本研究的主要研究者将统筹所有研究活动。