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9 "Survival analysis"
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Original Articles
Discrete-time Survival Analysis of Risk Factors for Early Menarche in Korean Schoolgirls
Yong Jin Gil, Jong Hyun Park, Joohon Sung
J Prev Med Public Health. 2023;56(1):59-66.   Published online December 29, 2022
DOI: https://doi.org/10.3961/jpmph.22.428
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  • 86 Download
AbstractAbstract AbstractSummary PDF
Objectives
The aim of this study was to evaluate the effect of body weight status and sleep duration on the discrete-time hazard of menarche in Korean schoolgirls using multiple-point prospective panel data.
Methods
The study included 914 girls in the 2010 Korean Children and Youth Panel Study who were in the elementary first-grader panel from 2010 until 2016. We used a Gompertz regression model to estimate the effects of weight status based on age-specific and sex-specific body mass index (BMI) percentile and sleep duration on an early schoolchild’s conditional probability of menarche during a given time interval using general health condition and annual household income as covariates.
Results
Gompertz regression of time to menarche data collected from the Korean Children and Youth Panel Study 2010 suggested that being overweight or sleeping less than the recommended duration was related to an increased hazard of menarche compared to being average weight and sleeping 9 hours to 11 hours, by 1.63 times and 1.38 times, respectively, while other covariates were fixed. In contrast, being underweight was associated with a 66% lower discrete-time hazard of menarche.
Conclusions
Weight status based on BMI percentiles and sleep duration in the early school years affect the hazard of menarche.
Summary
Korean summary
초경연령의 조기화는 세계적인 현상이나 유독 우리나라에서는 그 단축속도가 매우 빠르나. 그 위험요인은 비만 이외에 확립되어 있지 못하다. 본 연구는 한국아동청소년패널의 2010-16년도까지 추적관찰된 914 명의 여아 자료를 Gompetz 회귀모형 (다중 분절형 생존분석모형)을 통해 분석하였며, 그 결과 과체중은 1년의 초경연령 단축을 유발할 위험도가 정상체중 여아에 비해 1.63배, 수면시간이 충분하지 못한 여아는 충분한 수면을 취하는 여아에 비해 1년의 초경연령 단축이 발생할 위험도가 1.38배 높은 것으로 나타났다.
Modeling Survival in Patients With Brain Stroke in the Presence of Competing Risks
Solmaz Norouzi, Mohammad Asghari Jafarabadi, Seyed Morteza Shamshirgaran, Farshid Farzipoor, Ramazan Fallah
J Prev Med Public Health. 2021;54(1):55-62.   Published online December 7, 2020
DOI: https://doi.org/10.3961/jpmph.20.463
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AbstractAbstract PDF
Objectives
After heart disease, brain stroke (BS) is the second most common cause of death worldwide, underscoring the importance of understanding preventable and treatable risk factors for the outcomes of BS. This study aimed to model the survival of patients with BS in the presence of competing risks.
Methods
This longitudinal study was conducted on 332 patients with a definitive diagnosis of BS. Demographic characteristics and risk factors were collected by a validated checklist. Patients’ mortality status was investigated by telephone follow-up to identify deaths that may be have been caused by stroke or other factors (heart disease, diabetes, high cholesterol, etc.). Data were analyzed by the Lunn-McNeil approach at alpha=0.1.
Results
Older age at diagnosis (59-68 years: adjusted hazard ratio [aHR], 2.19; 90% confidence interval [CI], 1.38 to 3.48; 69-75 years: aHR, 5.04; 90% CI, 3.25 to 7.80; ≥76 years: aHR, 5.30; 90% CI, 3.40 to 8.44), having heart disease (aHR, 1.65; 90% CI, 1.23 to 2.23), oral contraceptive pill use (women only) (aHR, 0.44; 90% CI, 0.24 to 0.78) and ischemic stroke (aHR, 0.52; 90% CI, 0.36 to 0.74) were directly related to death from BS. Older age at diagnosis (59-68 years: aHR, 21.42; 90% CI, 3.52 to 130.39; 75-69 years: aHR, 16.48; 90% CI, 2.75 to 98.69; ≥76 years: aHR, 26.03; 90% CI, 4.06 to 166.93) and rural residence (aHR, 2.30; 90% CI, 1.15 to 4.60) were directly related to death from other causes. Significant risk factors were found for both causes of death.
Conclusions
BS-specific and non-BS-specific mortality had different risk factors. These findings could be utilized to prescribe optimal and specific treatment.
Summary
Demographic and Survivorship Disparities in Non–muscle-invasive Bladder Cancer in the United States
Munseok Seo, James R. Langabeer II
J Prev Med Public Health. 2018;51(5):242-247.   Published online August 23, 2018
DOI: https://doi.org/10.3961/jpmph.18.092
  • 6,025 View
  • 157 Download
  • 14 Crossref
AbstractAbstract PDF
Objectives
To examine survivorship disparities in demographic factors and risk status for non–muscle-invasive bladder cancer (NMIBC), which accounts for more than 75% of all urinary bladder cancers, but is highly curable with early identification and treatment. Methods: We used the US National Cancer Institute’s Surveillance, Epidemiology, and End Results registries over a 19-year period (1988-2006) to examine survivorship disparities in age, sex, race/ethnicity, and marital status of patients and risk status classified by histologic grade, stage, size of tumor, and number of multiple primary tumors among NMIBC patients (n=29 326). We applied Kaplan-Meier (K-M) and Cox proportional hazard methods for survival analysis. Results: Among all urinary bladder cancer patients, the majority of NMIBCs were in male (74.1%), non-Latino white (86.7%), married (67.8%), and low-risk (37.6%) to intermediate-risk (44.8%) patients. The mean age was 68 years. Survivorship (in median life years) was highest for non-Latino white (5.4 years), married (5.4 years), and low-risk (5.7 years) patients (K-M analysis, p<0.001). We found significantly lower survivorship for elderly, male (female hazard ratio [HR], 0.96), Latino (HR, 1.20), and unmarried (married HR, 0.93) patients. Conclusions: Survivorship disparities were ubiquitous across age, sex, race/ethnicity, and marital status groups. Non-white, unmarried, and elderly patients had significantly shorter survivorship. The implications of these findings include the need for a heightened focus on health policy and more organized efforts to improve access to care in order to increase the chances of survival for all patients.
Summary

Citations

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  • N6-methyladenosine-modified circ_104797 sustains cisplatin resistance in bladder cancer through acting as RNA sponges
    Congjie Xu, Jiaquan Zhou, Xiaoting Zhang, Xinli Kang, Shuan Liu, Mi Song, Cheng Chang, Youtu Lin, Yang Wang
    Cellular & Molecular Biology Letters.2024;[Epub]     CrossRef
  • Disparities in the prevalence and management of high-risk non-muscle invasive bladder cancer
    Angela Estevez, Sumedh Kaul, Aaron Fleishman, Ruslan Korets, Peter Chang, Andrew Wagner, Joaquim Bellmunt, Aria F. Olumi, Heidi Rayala, Boris Gershman
    Urologic Oncology: Seminars and Original Investigations.2023; 41(5): 255.e15.     CrossRef
  • Intermediate and high-risk non-muscle-invasive bladder cancer: an overview of epidemiology, burden, and unmet needs
    Kristin Grabe-Heyne, Christof Henne, Paramananthan Mariappan, Götz Geiges, Johannes Pöhlmann, Richard F. Pollock
    Frontiers in Oncology.2023;[Epub]     CrossRef
  • Treatment Outcomes of High-Risk Non-Muscle Invasive Bladder Cancer (HR-NMIBC) in Real-World Evidence (RWE) Studies: Systematic Literature Review (SLR)
    Mihaela Georgiana Musat, Christina Soeun Kwon, Elizabeth Masters, Slaven Sikirica, Debduth B Pijush, Anna Forsythe
    ClinicoEconomics and Outcomes Research.2022; Volume 14: 35.     CrossRef
  • Management, Surveillance Patterns, and Costs Associated With Low-Grade Papillary Stage Ta Non–Muscle-Invasive Bladder Cancer Among Older Adults, 2004-2013
    Kelly K. Bree, Yong Shan, Patrick J. Hensley, Niyati Lobo, Chengrui Hu, Douglas S. Tyler, Karim Chamie, Ashish M. Kamat, Stephen B. Williams
    JAMA Network Open.2022; 5(3): e223050.     CrossRef
  • Gender Disparities in Bladder Cancer-Specific Survival in High Poverty Areas Utilizing Ohio Cancer Incidence Surveillance System (OCISS)
    Laura Bukavina, Megan Prunty, Kirtishri Mishra, Helen Sun, David Sheyn, Britt Conroy, Amr Mahran, Gregory MacLennan, Fredrick Schumacher, Lee Ponsky, Sarah Markt
    Urology.2021; 151: 163.     CrossRef
  • Comparison of survival in elderly patients treated with uretero-cutaneostomy or ileal conduit after radical cystectomy
    Shang Huang, Hanzhong Chen, Teng Li, Xiaoyong Pu, Jiumin Liu, Xuecheng Bi
    BMC Geriatrics.2021;[Epub]     CrossRef
  • Non-Muscular Invasive Bladder Cancer: Re-envisioning Therapeutic Journey from Traditional to Regenerative Interventions
    Kuan-Wei Shih, Wei-Chieh Chen, Ching-Hsin Chang, Ting-En Tai, Jeng-Cheng Wu, Andy C. Huang, Ming-Che Liu
    Aging and disease.2021; 12(3): 868.     CrossRef
  • The impact of the social construct of race on outcomes among bacille Calmette‐Guérin‐treated patients with high‐risk non‐muscle–invasive bladder cancer in an equal‐access setting
    Corinne Lawler, Lin Gu, Lauren E. Howard, Brandee Branche, Emily Wiggins, Aditya Srinivasan, Meagan L. Foster, Zachary Klaassen, Amanda M. De Hoedt, Jeffrey R. Gingrich, Dan Theodorescu, Stephen J. Freedland, Stephen B. Williams
    Cancer.2021; 127(21): 3998.     CrossRef
  • Effect of Intravesical Chemotherapy on the Survival of Patients with Non-Muscle-Invasive Bladder Cancer Undergoing Transurethral Resection: A Retrospective Cohort Study Among Older Adults
    Ashis K. Das, Devi K. Mishra, Saji S. Gopalan
    The Open Urology & Nephrology Journal.2021; 14(1): 20.     CrossRef
  • Marital Status and Prognostic Nomogram for Bladder Cancer With Distant Metastasis: A SEER-Based Study
    Liangjun Tao, Xinyuan Pan, Lixiang Zhang, Jiawei Wang, Zican Zhang, Li Zhang, Chaozhao Liang
    Frontiers in Oncology.2020;[Epub]     CrossRef
  • Back pain following instillations of BCG for superficial bladder cancer is not a reactive complication: review of 30 Mycobacterium bovis BCG vertebral osteomyelitis cases
    Simon Cadiou, Omar Al Tabaa, Chi-Duc Nguyen, Marine Faccin, Raphaël Guillin, Matthieu Revest, Pascal Guggenbuhl, Eric Houvenagel, Edouard Pertuiset, Guillaume Coiffier
    Clinical Rheumatology.2019; 38(6): 1773.     CrossRef
  • Does Health Insurance Modify the Association Between Race and Cancer-Specific Survival in Patients with Urinary Bladder Malignancy in the U.S.?
    Juliana Morales, Aaron Malles, Marrell Kimble, Pura Rodriguez de la Vega, Grettel Castro, Alan M. Nieder, Noël C. Barengo
    International Journal of Environmental Research and Public Health.2019; 16(18): 3393.     CrossRef
  • Чи може бути гормонотерапія елементом комбінованого радикального лікування хворих на низькодиференційований рак сечового міхура?
    P. G. Yakovlev
    Шпитальна хірургія. Журнал імені Л. Я. Ковальчука.2019; (3): 75.     CrossRef
A Survival Analysis of Gastric or Colorectal Cancer Patients Treated With Surgery: Comparison of Capital and a Non-capital City
Nam-Soo Hong, Kyeong Soo Lee, Sin Kam, Gyu Seog Choi, Oh Kyoung Kwon, Dong Hee Ryu, Sang Won Kim
J Prev Med Public Health. 2017;50(5):283-293.   Published online July 3, 2017
DOI: https://doi.org/10.3961/jpmph.17.043
  • 5,870 View
  • 223 Download
  • 3 Crossref
AbstractAbstract PDFSupplementary Material
Objectives
The objective of the present study was to compare prognosis of patients with gastric or colorectal cancer according to places where they received surgeries. Methods: The cancer patients underwent surgeries in sampled hospitals located in Daegu were matched 1:1 to the patients who visited sampled hospitals in Seoul using propensity score method. After the occurrences of death were examined, Kaplan-Meier method was used for survival analysis and the log-rank test was performed to compare the survival curves. Results: A total of six out of 291 gastric cancer patients who had surgeries in Daegu died (2.1%) and ten deaths (3.4%) occurred from patients went Seoul hospitals. Out of 84 gastric cancer patients who had chemotherapy after surgeries in Daegu, 13 (15.5%) patients died while 18 (21.4%) deaths occurred among patients underwent surgeries in Seoul. Six deaths (6.9%) out of 87 colorectal cancer patients who had surgeries in Daegu were reported. Five patients (5.7%) died among the patients underwent surgeries in Seoul. Among the colorectal cancer patients with chemotherapy after surgeries, 13 patients (12.4%) who visited hospitals in Daegu and 14 (13.3%) patients who used medical centers in Seoul died. There were no significant differences according to places where patients used medical services. Conclusions: The result of this study is expected to be used as basic data for policy making to resolve centralization problem of cancer patients and to help patients to make rational choices in selection of medical centers.
Summary

Citations

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  • Domestic medical travel from non-Seoul regions to Seoul for initial breast cancer treatment: a nationwide cohort study
    Jae Ho Jeong, Jinhong Jung, Hee Jeong Kim, Jong Won Lee, Beom-Seok Ko, Byung Ho Son, Kyung Hae Jung, Il Yong Chung
    Annals of Surgical Treatment and Research.2023; 104(2): 71.     CrossRef
  • MCR1 and KPC2 Co-producing Klebsiella pneumoniae Bacteremia: First Case in Korea
    Ji Young Park, Sang Taek Heo, Ki Tae Kwon, Do Young Song, Kwang Jun Lee, Ji Ae Choi
    Infection & Chemotherapy.2019; 51(4): 399.     CrossRef
  • The Effect of Residential Area and Hospital Bed Size on the Use of Hospital in Other Regions for Cancer Inpatients
    Sung-Soo Kim
    Journal of Health Informatics and Statistics.2018; 43(1): 18.     CrossRef
Effects of Antiretroviral Therapy on the Survival of Human Immunodeficiency Virus-positive Adult Patients in Andhra Pradesh, India: A Retrospective Cohort Study, 2007-2013
Ram Bajpai, Himanshu Chaturvedi, Lakshmanan Jayaseelan, Pauline Harvey, Nicole Seguy, Laxmikant Chavan, Pinnamaneni Raj, Arvind Pandey
J Prev Med Public Health. 2016;49(6):394-405.   Published online October 28, 2016
DOI: https://doi.org/10.3961/jpmph.16.073
  • 7,414 View
  • 167 Download
  • 8 Crossref
AbstractAbstract PDF
Objectives
The survival outcomes of antiretroviral treatment (ART) programs have not been systematically evaluated at the state level in India. This retrospective study assessed the survival rates and factors associated with survival among adult human immunodeficiency virus (HIV)-infected patients in Andhra Pradesh, India.
Methods
The present study used data from 139 679 HIV patients aged ≥15 years on ART who were registered from 2007 to 2011 and were followed up through December 2013. The primary end point was death of the patient. Mortality densities (per 1000 person-years) were calculated. Kaplan-Meier and Cox-regression models were used to estimate survival and explore the factors associated with survival.
Results
The overall median follow-up time was 16.0 months (2.0 months for the deceased and 14.0 months for those lost to follow-up). Approximately 13.2% of those newly initiated on ART died during follow-up. Of those deaths, 56% occurred in the first three months. The crude mortality rate was 80.9 per 1000 person-years at risk. The CD4 count (adjusted hazard ratio [aHR],4.88; 95% confidence interval [CI], 4.36 to 5.46 for <100 cells/mm3 vs. >350 cells/mm3), functional status (aHR, 3.05; 95% CI, 2.82 to 3.30 for bedridden vs. normal), and body weight (aHR, 3.69; 95% CI, 3.42 to 3.97 for <45 kg vs. >60 kg) were strongly associated with the survival of HIV patients.
Conclusions
The study findings revealed that high mortality was observed within the first three months of ART initiation. Patients with poor baseline clinical characteristics had a higher risk of mortality. Expanded testing and counseling should be encouraged, with the goal of ensuring early enrollment into the program followed by the initiation of ART in HIV-infected patients.
Summary

Citations

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    Rimke Bijker, Sasisopin Kiertiburanakul, Nagalingeswaran Kumarasamy, Sanjay Pujari, Ly P Sun, Oon T Ng, Man P Lee, Jun Y Choi, Kinh V Nguyen, Yu J Chan, Tuti P Merati, Do D Cuong, Jeremy Ross, Awachana Jiamsakul
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Comparative Study
Comparison of Cancer Survival by Age Group for 1997 and for 2002: Application of Period Analysis using the National Cancer Incidence Database.
Seon Hee Yim, Kyu Won Jung, Young Joo Won, Hyun Joo Kong, Hai Rim Shin
J Prev Med Public Health. 2008;41(1):17-22.
DOI: https://doi.org/10.3961/jpmph.2008.41.1.17
  • 4,411 View
  • 35 Download
  • 2 Crossref
AbstractAbstract PDF
OBJECTIVES
Period analysis estimates up-to-date survival rates of cancer patients. In this approach, analysis is restricted to recent time period by left-truncating all observations at the beginning of the period and rightcensoring at its end. Here, we applied period analysis to examine changes in 5-year relative survival (RS) by age group for 1997 and for 2002. METHODS: Using the National Cancer Incidence Database, 5-year RS was estimated for 1997 and 2002 in four age groups (15-54, 55-64, 65-74, and 75 years old and over) using period analysis. After excluding death certificate-only cases, patients with an unknown date of diagnosis or follow-up length, a total of 813,889 patients diagnosed with a first primary invasive cancer during 1992-2002 were included for analysis. Followup for vital status was included until 31 December 2002. RESULTS: Five-year RS increased from 41.7% for 1997 to 46.7% for 2002. Increases in survival occurred in all age groups except in the 75 and over group. CONCLSIONS: The age gradient in cancer prognosis seems to have widened between 1997 and 2002, a finding that requires further study of prognostic factors, including stage at diagnosis. Period analysis accurately estimates survival rates, especially for cancers with better prognosis.
Summary

Citations

Citations to this article as recorded by  
  • Advanced Detection of Recent Changing Trends in Gastric Cancer Survival: Up-to-date Comparison by Period Analysis
    H. S. Kim, H. Lee, H. C. Jeung, S. H. Noh, H. C. Chung, J. K. Roh, C. M. Nam, S. Y. Rha
    Japanese Journal of Clinical Oncology.2011; 41(12): 1344.     CrossRef
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    Se-Min Hwang, Seok-Jun Yoon, Hyeong-Sik Ahn, Hyong-Gin An, Sang-Hoo Kim, Min-Ho Kyeong, Eun-Kyoung Lee
    Journal of Preventive Medicine and Public Health.2009; 42(1): 49.     CrossRef
Original Article
Survival Analysis of Hospitalized Mesothelioma Patients.
Chun Bae Kim, Sang Hyuk Jung, Kyung Jong Lee, Jong Doo Kang
Korean J Prev Med. 1990;23(1):77-86.
  • 1,788 View
  • 22 Download
AbstractAbstract PDF
Between 1977 and 1987, 20 patients with mesothelioma were treated at Severance Hospital. Data was gathered from medical charts at the time of hospitalization of mesothelioma patients and from a follow-up questionnaire by mail or telephone. The results acquired were as follows: 1. Among the 20 patients, 11 men and 9 women with mesothelioma were identified. The mean age at hospitalization was 47 years and 11 mesothelioma patients were known or presumed to be dead during the different observation periods. 2. Only one mesothelioma patient had a definite history of occupational asbestos exposure. 3. The sites of orgin of mesothelioma were the pleura(13), peritoneum(2), pericardium(2), mediastinum(2), and pelvis(1). Common symptoms included dyspnea, chest pain, abdominal distension, etc. 4. Pathologically, mesotheliomas were divided into 14 malignant types and 6 benign types ; and histologically, 8 fibrous mesotheliomas and 3 epithelial mesotheliomas were shown. 5. There was a statistically significant difference in survival rate according to pathologic type and smoking status. In the groups with malignant mesothelioma, 50% survival time from first symptoms was 18 months and that from diagnosis was 11 months. Also, 75% survival time from diagnosis was 6 months in the smoking groups and 19 months in the non-smoking groups.
Summary
English Abstracts
Effects of the Late Marriage of Korean Women on the First-birth Interval.
Woojin Chung, Kyoungae Lee, Sunmi Lee
J Prev Med Public Health. 2006;39(3):213-220.
  • 2,194 View
  • 81 Download
AbstractAbstract PDF
OBJECTIVES
The purpose of this study was to examine the effect of women's late age of marriage on the interval between marriage and their first birth. METHODS: Data from Year 2000 Korea National Fertility Survey was collected through direct interview questionings, and the data was analyzed based on randomly selected sampling. In particular, the married women (N=5,648) were analyzed for the factors that determined the first-birth interval by performing Cox's proportional hazard model survival analysis. RESULTS: Unlike previous findings, the woman whose age of marriage was 30 or more was more likely to delay the birth of her first baby than were the other women who married earlier. Further, a woman's age at marriage, a woman's residence before marriage, her husband's religion, her husband's level of education and the difference in age between the woman and her husband significantly influenced the first-birth interval. In contrast, for a married woman, her age, level of education, current residence and religion were not significant predictors of her first birth interval. CONCLUSIONS: Our study showed that women who married at the age of 30 years or more tend to postpone their first birth in Korea. When facing the increasing number of women who marry at a late age, the Korean government should implement population and social policies to encourage married women have their first child as early as possible.
Summary
Factors Affecting Breastfeeding Rate and Duration.
Won Ju Hwang, Woo Jin Chung, Dae Ryong Kang, Moon Hee Suh
J Prev Med Public Health. 2006;39(1):74-80.
  • 2,604 View
  • 136 Download
AbstractAbstract PDF
OBJECTIVES
The purpose of this study is to examine the factors affecting the rate and duration of breastfeeding. METHODS: We analyzed the data from the year 2000 Korea National Fertility Survey that was collected through direct interviews. In particular, the mothers who delivered their last child and the child was under 1 year of age from January 1998 to June 2000 (N=1,066) were analyzed via a logistic model to assess the factors affecting the breastfeeding rate. Among the study subjects, those who had initiated breastfeeding (N=740) were analyzed through Cox's proportional hazard model to evaluate the factors affecting the duration of breastfeeding. RESULTS: The multivariate logistic model showed that the delivery type and the baby's birth-weight have a statistically significant influence on the breastfeeding rate. Women who delivered their babies through Cesarean section were less likely than others to breastfeed. In contrast, the women whose babies weighed 2.5Kg or more were more likely than others to breastfeed. The results obtained from the survival analysis are as follows: the higher the mother's education level, the shorter is the breastfeeding duration. The mother's work status played a significant role in the early termination of breastfeeding. Women aged 35 or older showed a longer breastfeeding duration than the younger age groups, whereas the maternal age was not a significant factor in affecting whether or not a mother would breastfeed. CONCLUSIONS: Reducing the cases of operative delivery (Cesarean section) and low weight births, enlightening young and highly educated women on breastfeeding and improving the environment for breastfeeding on the job are important strategies to encourage women to breastfeed.
Summary

JPMPH : Journal of Preventive Medicine and Public Health