online - Each bar represents the proportion of infants receiving at least one respiratory medication post-NICU discharge during the first year of life, vs. the proportion who received no respiratory medication, grouped by gestational age at birth. This was statistically significant (P<0.0001 by chi-square). The denominators (n) for each gestational age group are 83 (23–24 weeks), 98 (25 weeks), 135 (26 weeks), 169 (27 weeks), 156 (28 weeks), for a total of 641 babies who completed all four post-discharge visits.