Table 2

Predictors of tPTEF:tE% in a Bayesian linear hierarchical regression model in a combined data set of all BLT and BILD study infants (born term and preterm)

Total infants, N=619EstimateEstimate error95% credible intervalR-hatBulk ESSTail ESS
Intercept37.492.4732.39 to 42.211.0010 8717632
Maternal asthma0.571.89−2.94 to 4.661.0082363675
Male sex0.851.42−1.94 to 3.621.0016 96423 535
Maternal asthma:male sex−3.481.71−6.81 to −0.111.0019 03324 182
fSecond-born*−1.950.94−3.79 to −0.091.0015 3639755
Third-born or later*−1.901.12−4.08 to 0.311.0017 10117 230
Age (days)−0.190.05−0.28 to −0.111.0020 66123 030
Exclusive breast feeding1.420.95−0.42 to 3.271.0016 14015 582
Weight gain (kg)3.170.941.34 to 5.041.0021 78519 535
  • Bayes factor=33.54.

  • *First-born is reference.

  • BILD, Bern Infant Lung Development; BLT, Breathing for Life Trial; ESS, effective sample size; tPTEF:tE%, time to reach peak tidal expiratory flow as a percentage of total expiratory time.