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US Milk Consumption per Person vs US Infant Mortality

US Milk Consumption per Person and US Infant Mortality correlate at r = +0.37 over 63 years (1961–2023), p = 0.0031. With the time trend removed, r = -0.30. Direction flips without the trend.

Verdict: Direction flips without the trend. The raw correlation is 0.37, but once each series' time trend is removed it becomes -0.30. The year-to-year movements run the opposite way to the long-run trends, so the headline number is misleading.

Pearson r
+0.37
p-value
0.0031
Years compared (n)
63 (1961–2023)
95% confidence interval
0.13 to 0.56
Correlation with the time trend removed
-0.30

Sources

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