Complex sentence: It is more common in male rather than female (4.32:1) and in white rather than non-white 9% of the Hirschsprung cases were also diagnosed as having Down's Syndrome.
Split into simpler sentences: It is more common in male rather than female (4.32:1) and in white rather than non-white. Nine percent of the Hirschsprung cases were also diagnosed as having Down's Syndrome.