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

Table 2

Calibration across deciles of risk and standardized mortality ratios for the two scores.

Model	Probability of death across 10 risk groups	Deaths across deciles of risk		Hosmer-Lemeshow goodness-of-fit test		Standardized Mortality Ratio (95% CI)
		Observed	Expected	Chi-square	𝑃 value
PIM				11.1	0.20	1 (0.88–1.13)
Group 1	0.14	15	9.4
Group 2	0.16	14	12
Group 3	0.17	6	13.4
Group 4	0.19	13	14.8
Group 5	0.21	18	16.4
Group 6	0.24	16	18.6
Group 7	0.30	23	22.2
Group 8	0.40	33	29.2
Group 9	0.56	36	38.3
Group 10	0.96	58	57.8
PIM 2				12	0.16	0.99 (0.87–1.12)
Group 1	0.13	14	8.3
Group 2	0.15	10	11.7
Group 3	0.17	7	12.8
Group 4	0.18	13	14.3
Group 5	0.21	15	15.9
Group 6	0.25	17	18.8
Group 7	0.32	27	22.9
Group 8	0.40	27	29.4
Group 9	0.58	45	38.4
Group 10	0.94	57	59.4

PIM: Pediatric Index of Mortality; CI: confidence interval.