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Table 3 Respiratory Morbidity and need for respiratory support by gestational age in weeks

From: Short-term respiratory outcomes in late preterm infants

  34 35 36 LPI 37 38 39 40 41 TI 34-41
  n = 151 n = 241 n = 458 n = 850 n = 1149 n = 2444 n = 3343 n = 3729 n = 2261 n = 12926 n = 13776
CRM a*** 38 (25.2) 38 (15.8) 29 (6.3) 105 (12.4) 32 (2.8) 28 (1.1) 19 (0.6) 28 (0.8) 14 (0.6) 121 (0.9) 226 (1.6)
TTN*** 13 (8.6) 18 (7.5) 18 (3.9) 49 (5.8) 15 (1.3) 17 (0.7) 10 (0.3) 14 (0.4) 8 (0.4) 64 (0.5) 113 (0.8)
RDS*** 17 (11.3) 16 (6.6) 7 (1.5) 40 (4.7) 9 (0.8) 3 (0.1) 2 (0.1) 2 (0.1) 1(0.0) 17 (0.1) 57 (0.4)
Apnea*** 5 (3.3) 2 (0.8) 3 (0.7) 10 (1.2) 3 (0.3) 2 (0.1) 2 (0.1) 2 (0.1) 1 (0.0) 10 (0.1) 20 (0.1)
Air leak*** 5 (3.3) 3 (1.2) 3 (0.7) 11 (1.3) 4 (0.3) 4 (0.2) 4 (0.1) 4 (0.1) 1 (0.0) 17 (0.1) 28 (0.1)
PPH*** 0 (0.0) 1 (0.4) 3 (0.7) 4 (0.5) 1 (0.1) 0 (0.0) 1 (0.0) 2 (0.1) 0 (0.0) 4 (0.0) 8 (0.2)
MAS 0 (0.0) 0 (0.0) 0 (0.0) 0 (0.0) 0 (0.0) 0 (0.0) 1 (0.0) 4 (0.1) 3 (0.1) 8 (0.1) 8 (0.05)
Respiratory failure** 3 (2.0) 2 (0.8) 0 (0.0) 5 (0.6) 4 (0.3) 6 (0.2) 1 (0.0) 4 (0.1) 1 (0.0) 16 (0.1) 21 (0.15)
Respiratory support*** 33 (21.8) 31 (12.8) 20 (4.3) 84 (9.8%) 23 (2) 15 (0.6) 11 (0.3) 14 (0.4) 10 (0.4) 73 (0.56) 157 (1.14)
Mechanical ventilation* 7 (4.6) 4 (1.65) 2 (0.43) 13 (1.5) 5 (0.43) 2 (0.08) 2 (0.06) 5 (0.13) 2 (0.08) 16 (0.12) 29 (0.21)
Data are expressed as absolute numbers and proportions (%) of observed data in each category. All tests refer to comparisons between late preterm infants (LPI) and term infants (TI).
  1. aFor definition of CRM and abbreviations see text.
  2. ***P < .001, using χ2or Fisher test as appropriate.
  3. **P < .01, using χ2or Fisher test as appropriate.
  4. *P < .05, using χ2or Fisher test as appropriate.