AR CAG repeat distributions in individuals born spontaneously preterm and in those born at term.

aMean ± standard deviation of CAGn repeat length.b1st quintile 10–19 repeats, 2nd quintile 20–21 repeats, 3rd quintile 22–23 repeats, 4th quintile 24–25 repeats, 5th quintile 26–42 repeats; frequencies shown separately for male and female individuals in Table S2.cORs for the highest quintile relative to the lowest quintile.