Burden of Disease Research Unit, South African Medical Research Council , Cape Town, South Africa.
School of Population and Global Health, The University of Western Australia , Australia.
Glob Health Action. 2021 Jan 1;14(1):1856471. doi: 10.1080/16549716.2020.1856471.
: The Global Burden of Disease (GBD) approach estimates disease burden by combining fatal (years of life lost) and non-fatal burden prevalence-based years of life lived with disability (PYLDs) estimates. Although South Africa has data to estimate mortality, prevalence data to estimate non-fatal burden are sparse. PYLD estimates from the GBD study for South Africa can potentially be used. However, there is a divergence in mortality estimates for South Africa between the second South African National Burden of Disease (SANBD2) and 2013 GBD studies. : We investigated the feasibility of utilising GBD PYLD estimates for stroke and diabetes by exploring different disease modelling scenarios. : DisMod II software-generated South African stroke and diabetes PYLDs for 2010 from models using local epidemiological parameters and demographic data for people 20-79 years old. We investigated the impact on PYLD estimates of 1) differences in the cause-of-death envelope, 2) differences in the cause-specific mortality estimates (increase/decrease by 15% for stroke and 30% for diabetes), and 3) difference using local disease parameters compared to other country or region parameters. Differences were expressed as ratios, average ratios and ratio ranges. : Using the GBD cause-of-death envelope (16% more deaths than SANBD2) and holding other parameters constant yielded age-specific ratios of PYLDs for stroke and diabetes ranging between 0.89 and 1.07 (average 0.98) for males. Similar results were observed for females. A 15% change in age-specific stroke mortality showed little difference in the ratio comparison of PYLDs (range 0.98-1.02) while a 30% change in age-specific diabetes mortality resulted in a ratio range of 0.96-1.07 for PYLDs depending on age. : This study showed that GBD non-fatal burden estimates (PYLDs) can be used for stroke and diabetes non-fatal burden in the SANBD2 study.
全球疾病负担(GBD)方法通过结合致命性(损失的生命年)和基于流行率的非致命性残疾生命年(PYLD)估计来评估疾病负担。虽然南非有数据来估计死亡率,但用于估计非致命性负担的流行率数据却很少。GBD 研究中南非的 PYLD 估计值可以被使用。然而,南非的死亡率估计值在第二次南非国家疾病负担(SANBD2)和 2013 年 GBD 研究之间存在差异。
我们通过探索不同的疾病建模方案,研究了利用 GBD PYLD 估计值来评估中风和糖尿病的可行性。
使用 DisMod II 软件生成的南非 2010 年中风和糖尿病的 PYLD 数据,模型使用了当地 20-79 岁人群的流行病学参数和人口数据。我们研究了以下三种情况对 PYLD 估计值的影响:1)死因范围的差异;2)特定病因死亡率估计值的差异(中风增加/减少 15%,糖尿病增加/减少 30%);3)使用当地疾病参数与其他国家或地区参数的差异。差异用比值、平均比值和比值范围表示。
使用 GBD 的死因范围(比 SANBD2 多 16%的死亡人数),并保持其他参数不变,对于男性,中风和糖尿病的特定年龄 PYLD 比值在 0.89 到 1.07 之间(平均为 0.98)。对于女性,也观察到了类似的结果。在特定年龄的中风死亡率变化 15%的情况下,PYLD 比值的比较差异很小(比值范围为 0.98-1.02),而特定年龄的糖尿病死亡率变化 30%的情况下,PYLD 的比值范围为 0.96-1.07,取决于年龄。
本研究表明,GBD 的非致命性负担估计值(PYLD)可用于 SANBD2 研究中的中风和糖尿病非致命性负担。