Development Research Group, World Bank, Washington, Columbia, USA
Development Research Group, World Bank, Washington, Columbia, USA.
BMJ Open. 2021 Aug 24;11(9):e050551. doi: 10.1136/bmjopen-2021-050551.
While COVID-19 has a relatively small direct impact on infant mortality, the pandemic is expected to indirectly increase mortality of this vulnerable group in low-income and middle-income countries through its effects on the economy and health system performance. Previous studies projected indirect mortality by modelling how hypothesised disruptions in health services will affect health outcomes. We provide alternative projections, relying on modelling the relationship between aggregate income shocks and mortality.
We construct a sample of 5.2 million births by pooling retrospective birth histories reported by women in Demographic and Health Surveys conducted in 83 low-income and middle-income countries between 1985 and 2018. We employ regression models with country-specific fixed-effects and flexible time trends to estimate the impact of gross domestic product per capita on infant mortality rate. We then use growth projections by the International Monetary Fund to predict the effect of the economic downturn in 2020 on infant mortality.
We estimate 267 208 (95% CI 112 000 to 422 415) excess infant deaths in 128 countries, corresponding to a 6.8% (95% CI 2.8% to 10.7%) increase in the total number of infant deaths expected in 2020.
The findings underscore the vulnerability of infants to the negative income shocks such as those imposed by the COVID-19 pandemic. While efforts towards prevention and treatment of COVID-19 remain paramount, the global community should also strengthen social safety nets and assure continuity of essential health services.
虽然 COVID-19 对婴儿死亡率的直接影响相对较小,但预计大流行将通过其对经济和卫生系统绩效的影响,间接增加低收入和中等收入国家这一脆弱群体的死亡率。先前的研究通过模拟卫生服务假设中断将如何影响健康结果来预测间接死亡率。我们提供了替代预测,依靠建模总收益冲击与死亡率之间的关系。
我们通过汇总 1985 年至 2018 年间在 83 个低收入和中等收入国家进行的人口与健康调查中妇女报告的回溯生育史,构建了一个包含 520 万例出生的样本。我们采用具有国家特定固定效应和灵活时间趋势的回归模型来估计人均国内生产总值对婴儿死亡率的影响。然后,我们使用国际货币基金组织的增长预测来预测 2020 年经济衰退对婴儿死亡率的影响。
我们估计在 128 个国家中会有 267208 例(95%CI112000 至 422415 例)婴儿死亡数增加,这相当于 2020 年预期婴儿死亡总数增加 6.8%(95%CI2.8%至 10.7%)。
这些发现强调了婴儿对 COVID-19 大流行等负面收益冲击的脆弱性。虽然预防和治疗 COVID-19 的努力仍然至关重要,但全球社会还应加强社会安全网,确保基本卫生服务的连续性。