BackgroundSecondhand smoke is an important risk factor to breast cancer patients’ survival. This article aimed to describe the epidemiological changes of health loss caused by female breast cancer attributable to secondhand smoke from 1990 to 2019.MethodsData on breast cancer was derived from the Global Burden of Disease study 2019. The epidemiological status and trends were estimated using the number, age-standardized rate (ASR), and estimated annual percentage change (EAPC).ResultsIn 2019, secondhand smoke-related breast cancer caused 168.33×102 death, 5242.58×102 years of life lost (YLLs), and 334.03×102 years lived with disability (YLDs) globally. The overall ASR of death and YLLs caused by breast cancer attributable to secondhand smoke presented decreasing trends from 1990 to 2019, with the respective EAPCs of −0.78 and −0.87. Meanwhile, decreasing trends occurred in most geographic regions, particularly that of YLLs in high-income North America (EAPC = −3.35). At the national level, most countries/territories had decreasing trends of death and YLLs, particularly Denmark, in which the respective EAPCs were −4.26 and −4.64. However, the ASR of YLDs showed an increasing trend globally (EAPC = 0.32). Meanwhile, increasing trends were observed in most regions and countries, particularly the Solomon Islands and Lesotho, with the respective EAPCs being 6.18 and 4.33. The changing trends were closely associated with sociodemographic development.ConclusionsTrends in secondhand smoke-related death and YLLs caused by breast cancer declined from 1990 to 2019. However, secondhand smoke remains a challenge to the patients’ longevity and quality of life. The findings informed strategies should be strengthened the control of secondhand smoking.

Background: Multiple myeloma (MM) is a common malignant disease of the bone marrow. The burden and trends of MM were systematically analyzed globally, which would inform health strategies.Methods: Data of the MM burden was explored from the Global Burden of Disease 2019. Trends in the age-standardized rate (ASR) of the MM burden were calculated using estimated annual percentage change (EAPC). Results: Globally, the incident cases of MM increased 136.10% since 1990, and reached 1556.88×102 in 2019. The overall incident ASR (/100,000 population) increased from 1.73 in 1990 to 1.92 in 2019, by an annual average 0.25% increase over the past thirty years (EAPC = 0.25, 95% confidence interval [CI]: 0.15 to 0.35). Increasing incident trends also occurred in most regions and countries, particularly Jamaica and Belarus, in which the respective EAPCs were 4.15 (95%CI: 3.41 to 4.90) and 3.25 (95%CI: 2.99 to 3.51). In 2019, MM caused 1134.74×102 deaths, and 24972.05×102 disability adjusted-life years (DALYs) globally. Trends in the overall ASR of DALYs minorly declined from 1990 to 2019 (EAPC = -0.16, 95%CI: -0.23 to -0.09), whereas that of death was relatively stable. Increasing trends in ASR of death and DALYs were observed in most regions and countries, except in high sociodemographic index (SDI) settings. Conclusions: The MM burden was heterogeneous across regions and countries and its changing trends were associated with sociodemographic factors. Cost-effective measures will still be needed to reduce the MM burden.

Background Multiple myeloma (MM) is a common malignant disease of the bone marrow. The burden and trends of MM were systematically analyzed globally, which would inform health strategies. Methods Data of the MM burden was explored from the Global Burden of Disease 2019. Trends in the age-standardized rate (ASR) of the MM burden were calculated using estimated annual percentage change (EAPC). Results Globally, the incident cases of MM increased 136.10% since 1990, and reached 1556.88×102 in 2019. The overall incident ASR (/100,000 population) increased from 1.73 in 1990 to 1.92 in 2019, by an annual average 0.25% increase over the past thirty years (EAPC = 0.25, 95% confidence interval [CI]: 0.15 to 0.35). Increasing incident trends also occurred in most regions and countries, particularly Jamaica and Belarus, in which the respective EAPCs were 4.15 (95%CI: 3.41 to 4.90) and 3.25 (95%CI: 2.99 to 3.51). In 2019, MM caused 1134.74×102 deaths, and 24972.05×102 disability adjusted-life years (DALYs) globally. Trends in the overall ASR of DALYs minorly declined from 1990 to 2019 (EAPC = -0.16, 95%CI: -0.23 to -0.09), whereas that of death was relatively stable. Increasing trends in ASR of death and DALYs were observed in most regions and countries, except in high sociodemographic index (SDI) settings. Conclusions The MM burden was heterogeneous across regions and countries and its changing trends were associated with sociodemographic factors. Cost-effective measures will still be needed to reduce the MM burden.