Supplemental Material 4. Estimated Effect of Calcium Use on Outcomes in Neonates (≤ 1 month) (N = 173)
	
	Calcium use		
 	No
(N = 88)	Yes
(N = 85)	Adjusted odds ratio
(95% CI)	Adjusted effect
(95% CI)	P-value	
Return of spontaneous circulation1	68 (77.3%)	41 (48.2%)	0.70 (0.29, 1.67)		0.421	
Survival to hospital discharge	63 (71.6%)	44 (51.8%)	0.78 (0.38, 1.62)		0.513	
Survival to hospital discharge with favourable neurologic outcome2,3	62 (70.5%)	43 (50.6%)	0.76 (0.37, 1.54)		0.445	
Survival to hospital discharge with PCPC of 1, 2, or no worse than baseline2	56 (63.6%)	39 (45.9%)	0.87 (0.43, 1.75)		0.696	
Change from baseline to hospital discharge in functional status of survivors2	1.0 [0.0, 2.0]	2.0 [0.0, 3.0]		0.36 (-0.54, 1.25)	0.430	
New morbidity among survivors4	11/63 (17.5%)	12/44 (27.3%)	1.61 (0.61, 4.25)		0.335	
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.
4 New morbidity among survivors is defined as a worsening from baseline functional status by 3 points or more.