Finally, even though we control for many more potential confounders than any other study on the subject, there may remain some unobserved factor, for example aspects of maternal IQ or personality, which could affect the results.
Finally, even though we control for manymore potential confounders than any other study on thesubject, there may remain some unobserved factor, forexample aspects of maternal IQ or personality, which couldaffect the results.