Logistic regression.

<p>Coefficients in all columns are logistic regression estimates, clustered standard errors are in parentheses;</p><p>*** indicate significance at 1% level.</p><p>^a<i>Toxoplasma</i> is a dummy variable and equals 1 for <i>Toxoplasma</i>-infected subjects.</p><p>^bRhD is a dummy variable and equals 1 for RhD positive subjects.</p><p>Logistic regression.