Number of deaths from select risk factors worldwide 2021

In 2021, high blood pressure contributed to around 10.85 million deaths worldwide, while there were around 3.71 million deaths due to obesity.

Annual number of deaths from select risk factors worldwide in 2021 (in millions)

Characteristic	Number of deaths in millions
High blood pressure	10.85
Air pollution (outdoor & indoor)	8.08
Smoking	6.18
High blood sugar	5.29
Outdoor particulate matter pollution	4.72
Obesity	3.71
High cholestral	3.65
Indoor air pollution	3.11
Diet high in sodium	1.86
Alcohol use	1.81
Diet low in fruits	1.68
Diet low in whole grains	1.55
Low birth weight	1.54
Secondhand smoke	1.29
Unsafe sex	0.9
Diet low in vegetables	0.86
Unsafe water source	0.8
Diet low in nuts and seeds	0.66
Low physical activity	0.66
Unsafe sanitation	0.6
Child wasting	0.49
Drug use	0.46
Low bone mineral density	0.46
No access to handwashing facility	0.45
Child stunting	0.31
Non-exclusive breastfeeding	0.09
Iron deciency	0.03
Vitamin-A deciency	0.02

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Number of deaths worldwide from select risk factors in 2021

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