BioMed Research International

Research Article

Pediatric Index of Mortality and PIM2 Scores Have Good Calibration in a Large Cohort of Children from a Developing Country

Table 4

Logistic regression model of PIM and PIM2 in the study sample.


	Coefficient (95% CI) in our study	value	Coefficient (95% CI) in development set	value

Variables: PIM
Pupils fixed to light (yes/no)	2.38 (1.32, 3.44)	0.004	2.35 (1.87, 2.84)	<0.00005
Specified diagnosis (yes/no)	0.73 (0.04, 1.42)	0.037	1.82 (1.45, 2.2)	<0.00005
Elective admission (yes/no)	−0.67 (−1.74, 0.39)	0.21	−1.55 (−1.94, −1.16)	<0.00005
Mechanical ventilation (yes/no)	1.72 (1.24, 2.19)	<0.001	1.34 (0.95, 1.72)	<0.00005
Absolute (SBP-120) mm Hg	0.19 (0.006, 0.33)	0.004	0.021 (0.014, 0.027)	<0.00005
Absolute base excess (mmol/l)	0.004 (0.03, 0.04)	0.845	0.071 (0.046, 0.095)	<0.00005
100× FiO₂/PaO₂ (mm Hg⁻¹)	0.89 (0.28, 1.49)	0.004	0.41 (0.23, 0.59)	<0.00005
Constant	−2.48 (−3.01, −1.9)		−4.873 (−5.25, −4.49)
Variables: PIM 2
Pupils fixed to light (yes/no)	2.67 (1.51, 3.8)	0.008	3.07 (2.77, 3.38)	<0.0005
Elective admission (yes/no)	Omitted	—	−0.92 (−1.17, −0.6)	<0.0005
Mechanical ventilation (yes/no)	1.89 (1.41, 2.37)	<0.001	1.37 (1.08, 1.65)	<0.0005
Absolute (SBP-120) mm Hg	0.01 (0.005, 0.03)	0.008	0.01 (0.013, 0.017)	<0.0005
Absolute (base excess) mmol/l	0.006 (0.03, 0.04)	0.77	0.10 (0.09, 0.11)	<0.0005
100× FiO₂/PaO₂ (mm Hg⁻¹)	0.97 (0.34, 1.6)	0.002	0.28 (0.20, 0.37)	<0.0005
Recovery post procedure (yes/no)	0.98 (−2.1, 0.1)	0.09	−0.93 (−1.2, −0.6)	<0.0005
By pass (yes/no)	Omitted		0.75 (0.39, 1.10)	<0.0005
High risk diagnosis (yes/no)	0.78 (0.10, 1.4)	0.023	1.68 (1.5, 1.8)	<0.0005
Low risk diagnosis (yes/no)	−0.99 (−2.2, 0.29)	0.13	−1.57 (−2.02, −1.12)	<0.0005
Constant	−2.55 (−3.1, −1.9)		−4.88 (−5.11, −4.6)

SBP: systolic blood pressure; FiO₂: fraction of inspired oxygen; PaO₂: partial pressure of oxygen; PIM: Pediatric Index of Mortality; CI: confidence interval.