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Table 3 Derivation of propensity scores via multivariable logistic regression model

From: Continuous versus intermittent short-acting β2-agonists nebulization as first-line therapy in hospitalized children with severe asthma exacerbation: a propensity score matching analysis

Equation parametersCoefficientStandard error95% confidence intervalP-value
Age function 1a−2.961.63−6.15, 0.230.069
Age function 2a0.010.01−0.01, 0.010.147
Respiratory rate function 1a35,024.0417,178.241355.31, 68,692.770.041
Respiratory rate function 2a−11,823.005542.34−22,685.78, − 960.220.033
Pulse rate function 1a− 284,024.70707,345.10−1,670,396.00, 1,102,346.000.688
Pulse rate function 2a66,655.37160,989.00− 248,877.30, 382,188.100.679
Oxygen saturation function 1a− 815,886.902,937,831.00−6,573,930.00, 4,942,156.000.781
Oxygen saturation function 2a197,629.00731,112.40−1,235,325.00, 1,630,583.000.787
Constant (intercept)−6.9343.00− 91.20, 77.350.872
  1. aOptimal second-degree fractional polynomial terms for age, respiratory rate, pulse rate and oxygen saturation parameters