Shapiro-Mendoza Carrie K, Selwyn Beatrice J, Smith David P, Sanderson Maureen
School of Public Health, University of Texas Health Science Center, Houston, USA.
Stud Fam Plann. 2007 Sep;38(3):198-205. doi: 10.1111/j.1728-4465.2007.00131.x.
Research has demonstrated that prolonged duration of breastfeeding promotes child survival. This study examines the impact of unintended--mistimed or unwanted--pregnancy on breastfeeding duration. We use data from the 1990 Paraguay and 1994 Bolivia Demographic and Health Surveys and restrict our analysis to last-born, surviving children younger than 36 months from singleton births. To assess the association, unintended and intended pregnancies are compared by calculating incidence rates and adjusted hazard ratios (aHR) using survival analysis. Most children (approximately 95 percent) were breastfed initially, but the median duration of breastfeeding in Bolivia was five months longer than that in Paraguay (19 versus 14 months). A greater proportion of pregnancies were described as intended in Paraguay than in Bolivia (74 percent versus 45 percent). In adjusted analyses, unwanted and mistimed pregnancies were associated with slightly longer duration of breastfeeding (aHR = 0.9) than were intended pregnancies, but the association was not statistically significant. In this study, therefore, pregnancy intention was not an important factor in duration of breastfeeding in Bolivia or Paraguay.
研究表明，延长母乳喂养时间可提高儿童存活率。本研究探讨意外怀孕（时机不当或意外怀孕）对母乳喂养时间的影响。我们使用了1990年巴拉圭和1994年玻利维亚人口与健康调查的数据，并将分析限制在单胎出生的36个月以下的最后出生的存活儿童。为了评估这种关联，通过计算发病率和使用生存分析调整风险比（aHR）来比较意外怀孕和计划怀孕。大多数儿童（约95%）最初进行母乳喂养，但玻利维亚的母乳喂养中位时间比巴拉圭长5个月（19个月对14个月）。巴拉圭称计划怀孕的比例高于玻利维亚（74%对45%）。在调整分析中，意外怀孕和时机不当的怀孕与母乳喂养时间略长有关（aHR = 0.9），但这种关联在统计学上不显著。因此，在本研究中，怀孕意愿并非玻利维亚或巴拉圭母乳喂养时间的重要因素。
