Characteristics of pulmonary air leak
| Prevalence of pulmonary air leak and OR | |||||
|---|---|---|---|---|---|
| Gestational weeks | Group 1, n/N (%) | Group 2, n/N (%) | p Value | Group 1, OR (95% CI) | Group 2, OR (95% CI) |
| Total | 26/2483 (1.0) | 47/2555 (1.8) | 0.01 | 1 [reference] | 1.77 (1.10 to 2.90) |
| 37 | 4/373 (1.0) | 13/369 (3.5) | 0.02 | 1 [reference] | 3.36 (1.17 to 12.04) |
| 38 | 5/654 (0.7) | 16/713 (2.2) | 0.02 | 1 [reference] | 2.97 (1.15 to 9.15) |
| 39 | 8/737 (1.0) | 9/723 (1.2) | 0.77 | 1 [reference] | 1.14 (0.43 to 3.07) |
| 40 | 6/549 (1.0) | 5/568 (0.8) | 0.71 | 1 [reference] | 0.80 (0.23 to 2.68) |
| 41 | 3/170 (1.7) | 4/182 (2.2) | 0.77 | 1 [reference] | 1.25 (0.27 to 6.42) |
| Adjusted OR for pulmonary air leak by update of guidelines in 2010 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Excluding resuscitation variables* | Including oxygen treatment† | Including face mask CPAP‡ | Including bag-and-mask ventilation§ | |||||
| Gestational weeks | Group 1, aOR (95% CI) | Group 2, aOR (95% CI) | Group 1, aOR (95% CI) | Group 2, aOR (95% CI) | Group 1, aOR (95% CI) | Group 2, aOR (95% CI) | Group 1, aOR (95% CI) | Group 2, aOR (95% CI) |
| Total | 1 [reference] | 1.66 (1.02 to 2.76) | 1 [reference] | 2.44 (1.47 to 4.13) | 1 [reference] | 0.81 (0.46 to 1.44) | 1 [reference] | 1.66 (1.02 to 2.77) |
| 37 | 1 [reference] | 4.37 (1.40 to 17.45) | 1 [reference] | 5.62 (1.70 to 23.96) | 1 [reference] | 1.90 (0.47 to 8.71) | 1 [reference] | 4.38 (1.40 to 17.43) |
| 38 | 1 [reference] | 2.80 (1.04 to 8.91) | 1 [reference] | 4.09 (1.47 to 13.31) | 1 [reference] | 1.66 (0.54 to 5.77) | 1 [reference] | 2.89 (1.07 to 9.31) |
| 39 | 1 [reference] | 1.17 (0.42 to 3.36) | ||||||
| 40 | 1 [reference] | 0.64 (0.17 to 2.24) | ||||||
| 41 | 1 [reference] | 1.39 (0.24 to 10.70) | ||||||
Adjusted confounders. *Maternal age, multipara, multiple births, abruptio placentae, meconium staining of the amniotic fluid, caesarean section, labour induction, epidural labour analgesia, low Apgar score at 5 min (≤7), low birth weight (<2500 g).
†Same as *, adding oxygen treatment. ‡Same as *, adding face mask CPAP.
§Same as *, adding bag-and-mask ventilation. aOR, adjusted OR; CPAP, continuous positive airway pressure.