Supplemental Material 5. Estimated Effect of Calcium Use on Outcomes in Hyperkalemic Children (N = 30)
	
	Calcium use		
 	No
(N = 10)	Yes
(N = 20)	Unadjusted odds ratio
(95% CI)	Unadjusted effect
(95% CI)	P-value	
Return of spontaneous circulation1	8 (80.0%)	6 (30.0%)	0.14 (0.01, 2.80)		0.198	
Survival to hospital discharge	3 (30.0%)	5 (25.0%)	1.82 (0.27, 12.49)		0.541	
Survival to hospital discharge with favourable neurologic outcome2,3	3 (30.0%)	5 (25.0%)	1.82 (0.27, 12.49)		0.541	
Survival to hospital discharge with PCPC of 1, 2, or no worse than baseline2	2 (20.0%)	5 (25.0%)	3.19 (0.40, 25.28)		0.272	
Change from baseline to hospital discharge in functional status of survivors2	4.0 [0.0, 6.0]	0.0 [0.0, 1.0]		-2.58 (-5.61, 0.44)	0.085	
Models controlled for duration of CPR.
1 Return of spontaneous circulation reported is the immediate outcome of the resuscitation event.
2 Baseline PCPC and FSS represent subject status prior to the event leading to hospitalization.
3 Favourable neurologic outcome is defined as Pediatric Cerebral Performance Category (PCPC) no more than moderate disability (PCPC of 1, 2, or 3) or no worse than baseline.