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US Adult Obesity vs US Population

US Adult Obesity and US Population correlate at r = +1.00 over 45 years (1980–2024), p < 0.0001. With the time trend removed, r = +0.93. Holds up after detrending.

Verdict: Holds up after detrending. Statistically significant (p = < 0.0001) and the association survives trend removal (detrended r = 0.93). Correlation still isn't causation, but this one isn't an obvious artifact.

Pearson r
+1.00
p-value
< 0.0001
Years compared (n)
45 (1980–2024)
95% confidence interval
0.99 to 1.00
Correlation with the time trend removed
+0.93

Sources

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Correlation does not imply causation. How the verdict is worked out.