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US Forest Area vs US Health Expenditure

US Forest Area and US Health Expenditure correlate at r = +0.93 over 24 years (2000–2023), p < 0.0001. With the time trend removed, r = +0.58. Holds up after detrending.

Verdict: Holds up after detrending. Statistically significant (p = < 0.0001) and the association survives trend removal (detrended r = 0.58). Correlation still isn't causation, but this one isn't an obvious artifact.

Pearson r
+0.93
p-value
< 0.0001
Years compared (n)
24 (2000–2023)
95% confidence interval
0.83 to 0.97
Correlation with the time trend removed
+0.58

Sources

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