Egger's test in SPSS How can I conduct an Egger's test using SPSS17? For each study included in the meta-analysis I know effect size and sample size of patients and controls groups.
 A: In order to conduct Egger's regression test you will also need the standard errors ($SE_i$) of your effect sizes ($ES_i$). Then generate the so called standard normal deviate (SND) which is defined as effect size divided by its standard error ($ES_i / SE_i$). Next, generate the precision which is $\frac{1}{SE_i}$. The regression model is: $SND = a + b \cdot precision$ (I know the error term is missing but let's keep it simple). Finally, estimate this regression model (unweighted) in SPSS/PASW (see Egger et al 1997: "Methods: Measures of funnel plot asymmetry").
The logic of Egger's regression test in explained in another CrossValidated thread: "Egger’s linear regression method intercept in meta analysis".
A: I don't use PASW anymore, but implementation of the Egger's test for asymmetry is quite simple. First please look at the Egger's paper where he propose "theory" behind the test.
Basically you have two variables: (i) normalized effect estimate (your estimate divided by its standard error), and (ii) precision (reciprocal of the standard error of the estimate). Then you should conduct simple linear regression and test for intercept $\beta_0 = 0$.
