Table 2.
Respiratory support for 18246 infants born at GA 22–28 weeks in NRN centers January 1, 2002 – December 31, 2012 who survived > 12 hours after birtha
| No. (%) | 2002 (N=1666) |
2012 (N=1756) |
2003–2007 (N=8546) |
2008–2012 (N=8034) |
|---|---|---|---|---|
| Never used conventional or high-frequency ventilation | 167 (10) | 255 (15) | 886 (10) | 1047 (13) |
| Any high-frequency ventilation | 504 (30) | 632 (36) | 3123 (37) | 3070 (38) |
| Any conventional ventilation | 1497 (90) | 1442 (82) | 7446 (87) | 6653 (83) |
| Any nasal SIMV | 239 (14) | 657 (37) | 1510 (18) | 2592 (32) |
| Any CPAP therapy | 1314 (79) | 1357 (77) | 6680 (78) | 6227 (78) |
| Nasal SIMV highestb | 13 (<1) | 45 (3) | 89 (1) | 178 (2) |
| CPAP highestb | 120 (7) | 190 (11) | 663 (8) | 746 (9) |
Information was missing as follows: never used conventional or high-frequency ventilation, 6 infants; high-frequency ventilation, 9 infants; conventional ventilation, 6 infants; any nasal SIMV, 11 infants; any CPAP, 13 infants; nasal SIMV highest, 6 infants; CPAP highest, 6 infants.
Respiratory support outcomes were examined for infants born 2002–2012 due to changes in data collection. Analyses were repeated in the subset of 11 centers in the NRN all years 2002–2012 (N=12,879).
Highest level of support was defined for nasal SIMV as never used conventional or high-frequency ventilation but used nasal SIMV, and for CPAP as never used conventional or high-frequency ventilation or nasal SIMV but received CPAP therapy.