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US Fertility Rate vs US Infant Mortality

US Fertility Rate and US Infant Mortality correlate at r = +0.81 over 64 years (1960–2023), p < 0.0001. With the time trend removed, r = +0.68. Holds up after detrending.

Verdict: Holds up after detrending. Statistically significant (p = < 0.0001) and the association survives trend removal (detrended r = 0.68). Correlation still isn't causation, but this one isn't an obvious artifact.

Pearson r
+0.81
p-value
< 0.0001
Years compared (n)
64 (1960–2023)
95% confidence interval
0.71 to 0.88
Correlation with the time trend removed
+0.68

Sources

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