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Table 1 Statistical analysis of duration of mechanical ventilation and mortality

From: Correlation of maximal inspiratory pressure to transdiaphragmatic twitch pressure in intensive care unit patients

Outcome Index yo a b c R2 F p
Duration of ventilation PdiTw −122 −158 988 −1236 0.75 27.1 < 0.0001
Duration of ventilation Pimax 96 −431 17193 −119569 0.42 6.4 < 0.002
Mortality PdiTw −12.3 290 −325 −120 0.90 129.9 < 0.0001
Mortality Pimax −14.9 2325 −29779 103878 0.73 40.0 < 0.0001
Duration of ventilation PesoTw 11.6 −102 464 −435 0.72 22.9 < 0.0001
Mortality PesoTw −10 4.18 487 −755 0.77 50.4 < 0.0001
  1. All relationships represent nonlinear regression curve fits to an inverse third order exponential equation, i.e. y = yo + a/x + b/x2 + c/x3
  2. The correlation coefficient of the equation is presented as R2. Also provided are the F statistic for the curve fit and the p value
  3. PdiTw transdiaphragmatic twitch pressure in response to bilateral magnetic stimulation of the phrenic nerves
  4. PesoTw esophageal twitch pressure in response to bilateral magnetic stimulation of the phrenic nerves, Pimax maximum inspiratory pressure