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Table 2 Correlation of number of trials (if >0) vs each variable

From: Gross Domestic Product (GDP) and productivity of schizophrenia trials: an ecological study

Variable

r

95% CI for r

r2

GDP (in million US $)

0.87

0.79 to 0.92

0.76

Population (in thousands)

0.14

-0.11 to 0.38

0.02

GDP/Capita (US $)

0.31

0.06 to 0.52

0.10

Telephones/per 100 inhabitants

0.30

0.06 to 0.52

0.09