Beyond the Average: Trends in Extreme Sodium Intake in the U.S. Population, 2003-2018

Area of Science:

• Nutrition Science
• Public Health
• Cardiovascular Health

Background:

• Excessive sodium intake is a primary driver of hypertension and cardiovascular disease (CVD).
• Existing nutrition surveillance often overlooks extreme sodium consumption patterns.
• Understanding evolving high sodium intake trends across populations is crucial for public health.

Purpose of the Study:

• To analyze US sodium consumption patterns from 2003-2018 using NHANES data.
• To focus on extreme consumption levels and trends in vulnerable populations.
• To evaluate changes in sodium intake acceleration and deceleration over time and with age.

Main Methods:

• Analysis of 60,663 participants (ages 5-80) from 2003-2018 NHANES data.
• Non-linear Gaussian regression to model sodium intake (mg/day) by age and survey cycle.
• Classification of intake curves (IA, ID, DA, DD) and identification of turning points in subgroups.

Main Results:

• Most adults showed an initial increase then plateau/decline in sodium intake around age 20-30.
• Girls exhibited a steady decline, while boys showed an accelerating increase in sodium intake.
• Top 10% of the population consumed >5000 mg/day, exceeding recommended limits; individuals with CVD still consumed high levels.

Conclusions:

• US sodium intake showed no significant decline from 2003-2018, particularly at extreme levels.
• Current public health efforts appear insufficient to achieve the WHO's 2030 sodium reduction target.
• Addressing extreme sodium consumption is critical for cardiovascular health initiatives.