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Table 2 Chronological and postmenstrual age on the day of lung function testing (LFT) (means with SDs in brackets; the p-values show the extent of statistical significance when data from the two patient groups were compared)

From: Development of lung function in very low birth weight infants with or without bronchopulmonary dysplasia: Longitudinal assessment during the first 15 months of corrected age

  1st LFT 2nd LFT 3nd LFT p-value
Age (days)     
   Without BPD 140.1 (48.5) 302.7 (77.7) 522.3 (128.6)  
   With BPD 150.7 (49.1) 293.0 (115.2) 517.1 (155.5) 0.928
Postmenstrual age (weeks)     
   Without BPD 49.0 (7.5) 71.3 (12.8) 100.4 (22.1)  
   With BPD 48.4 (8.0) 70.0 (17.6) 101.4 (22.6) 0.944