Table 2.

GA Analysis

GA (weeks)
30
(n = 25)
31
(n = 40)
32
(n = 95)
33
(n = 122)
34
(n = 153)
Birth weight (g)1445 ± 2551752 ± 2851800 ± 2352060 ± 2722298 ± 336
Discharge weight (g)2220 ± 2322293 ± 3422181 ± 2732276 ± 3282318 ± 314
PMA at last apnea (weeks)34.6 ± 1.9*34.5 ± 1.1*34.6 ± 1.1*35.5 ± 1.335.4 ± 0.9
PMA at last orogastric or nasogastric feed34.6 ± 1.2*34.3 ± 0.9*34.7 ± 0.9*34.9 ± 1.1*35.5 ± 0.8
PMA last in incubator33.9 ± 0.9*33.9 ± 0.9*34.2 ± 0.7*34.7 ± 0.7*34.9 ± 0.5
PMA at discharge to home35.8 ± 1.235.6 ± 0.935.6 ± 0.935.9 ± 1.135.9 ± 0.8
Margin of safety (days)6.5 ± 3*7.3 ± 5*6.3 ± 5*6.2 ± 4.3*4.9 ± 3.5
Number with apnea (%)23 (92)36 (90)56 (59)59 (48)46 (30)
Number needing orogastric or nasogastric feeds25 (100)36 (90)82 (86)80 (66)64 (42)
Number needing incubator23 (92)34 (85)83 (87)102 (84)110 (72)
Discharge with home monitor4 (16)4 (10)4 (4)3 (2.5)5 (3)
Discharge with methylxanthines3 (12)2 (5)5 (5)3 (2.5)1 (0.7)
  • *P < .05 compared with 34 weeks.