Table 4 Results from Gamma GAMMs for the longitudinal effects of B-line scores on physiological parameters.

From: Intraoperative B-line scores increase over time and are minimally affected by central venous pressure during transurethral resection of the prostate

Model

Random intercept variance

Adjusted pseudo-R2

Log-likelihood (REML)

Time effect

B-line score effect

Interaction effect (time × B-line score)

Dependent variable

Independent variable

PaO₂/FiO₂ ratio

B-line score

 < 0.001

0.377

788.497

F = 368.848,P < 0.001

F = 8.460, P = 0.004

F = 0.657, P = 0.409

Hb

B-line score

 < 0.001

0.157

986.562

F = 174.159, P < 0.001

F = 1.170, P = 0.280

F = 5.338, P < 0.001

Ppeak

B-line score

0.001

0.273

738.984

F = 278.512, P < 0.001

F = 2.066, P = 0.151

F = 3.107, P = 0.016

Na+

B-line score

 < 0.001

0.069

1445.018

F = 25.132, P < 0.001

F = 3.765, P = 0.053

F = 6.229, P < 0.001

K+

B-line score

 < 0.001

0.278

695.930

F = 152.816, P < 0.001

F = 1.487, P = 0.223

F = 0.007, P = 0.933

  1. These models were adjusted for age, weight, height, effective tidal volume, and intraoperative use of furosemide. Random effects included only a patient-specific random intercept (random = list(patient_id =  ~ 1)). Pseudo-R2 (deviance explained) was computed as \(1-\frac{\text{residual deviance}}{\text{null deviance}}\), representing the proportion of deviance explained by the model. Models were fitted using restricted maximum likelihood (REML). GAMM, generalized additive mixed model; Hb, hemoglobin; Ppeak, peak airway pressure; Na⁺, arterial sodium concentration; K⁺, arterial potassium concentration.
Back to article page